• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

Carnegie Museum of Natural History

One of the Four Carnegie Museums of Pittsburgh

  • Visit
    • Buy Tickets
    • Visitor Information
    • Exhibitions
    • Events
    • Dining at the Museum
    • Celebrate at the Museum
    • Powdermill Nature Reserve
    • Event Venue Rental
  • Learn
    • Field Trips
    • Educator Information
    • Programs at the Museum
    • Bring the Museum to You
    • Guided Programs FAQ
    • Programs Online
    • Climate and Rural Systems Partnership
  • Research
    • Scientific Sections
    • Science Stories
    • Science Videos
    • Senior Science & Research Staff
    • Museum Library
    • Science Seminars
    • Scientific Publications
    • Specimen and Artifact Identification
  • About
    • Mission & Commitments
    • Directors Team
    • Museum History
  • Tickets
  • Give
  • Shop

Super Science

March 4, 2021 by wpengine

How I Became an Archaeologist

 

woman with glasses and gray hair sitting outside

If you had told me when I was 15 that I would spend my life as an archaeologist, I probably would have been pretty surprised. I didn’t grow up knowing a great deal about archaeology or even being fascinated by arrowheads. At that time, I might well have asked what an archaeologist really is and what one actually does. I did get to visit the Parthenon and other ruins while on a trip with my aunt when I was sixteen. Even then, I don’t remember having more than a casual interest in what could be learned from these places. I was more interested in the living people and the new food dishes I encountered on that trip, which was my first trip outside the United States.

From talking to other archaeologists, I’ve learned that there are a lot of paths to deciding archaeology is going to be your life’s work. In my case, what led me to archaeology was anthropology, and specifically an elective course I took in the Fall of my senior year in high school that was taught by a Ph.D. student at the University of Massachusetts. Until then I had not been a serious student, although I did well enough in school. Perhaps I was slightly bored by most of my courses, but anthropology was anything but boring! It looked at people elsewhere in the world and over great periods of time. Many of these people lived different lives than my friends and I did, and they sometimes thought very differently about what was important in life than people here in the United States. I was fascinated, and, honestly, I particularly liked the fact that the conventions of American society, which to my teenage self were sometimes a little confining, weren’t after all the only sensible way to approach life. That year, as I chose a college to attend, I specifically looked for anthropology programs. I chose Beloit College in Wisconsin, which to this day has an excellent anthropology program.

Initially, I thought that I was most interested in cultural anthropology, but like most anthropology departments in the United States, Beloit required its anthropology majors to take courses in biological anthropology, linguistic anthropology, and archaeology as well as cultural anthropology. These are what are known as the four fields of American anthropology and together, they give us a more complete picture of humans in both the past and the present. Most people focus their careers in one subfield or another, though we recognize the importance of each one for understanding humans, and in most cases in North America our degrees are in anthropology not one of the subfields. In college, I found all these courses more fascinating than anything I had studied before, and I actually became a good student as I explored anthropology. I was learning so much neat stuff! I also did volunteer work in the Logan Museum at Beloit, which was founded at the end of the nineteenth century and holds some pretty amazing ethnographic and archaeological collections. It was there I first became interested in artifacts and learned to clean and care for them. After a college internship in cultural anthropology convinced me that cultural anthropology was not the most interesting part of anthropology after all, I began to focus on archaeology. I was most intrigued by my courses in Mesoamerican archaeology and North American archaeology, which before college had been completely unknown to me.

When I graduated from college, I still wasn’t sure what I would do with my life. I worked for about two years both in social work and as a tax auditor for the IRS, but decided in 1974 to try graduate school in archaeology because I still found what archaeology had taught me about past people compelling. I lived in Chicago, so I enrolled in the Ph.D. program in North American archaeology at Northwestern University in Evanston, Illinois.

My graduate self in the late 1970s. Photo credit: Phillip Neusius

The biggest shock of graduate school was my professors’ almost immediate insistence that I pick what research I wanted to do. They pushed me to develop an expertise or skill within North American archaeology through my research. It sounds obvious to me now, but I think many beginning graduate students are like I was, lovers of the discipline’s knowledge, but a bit daunted by becoming an independent researcher. Developing an area of focus and specialty skills is part of becoming a professional archaeologist. One reason for this is because contemporary archaeological undertakings rely on teams of researchers, each contributing special skills and knowledge to accomplish the many aspects of excavation, analysis, and interpretation. If you envision archaeology as the solitary pursuit of an elusive artifact or site, you don’t have the picture quite right. Think instead of archaeological fieldwork involving groups of scientists working together to discover and carefully record many different bits of evidence about what the world used to be like and what people did in it. Also think about the many hours these scientists and others will spend not only in the field, but in the laboratory after an excavation is completed cleaning finds, describing artifacts, and analyzing data in order to make meaningful interpretations.

For someone like myself, who loved all aspects of anthropology, not to mention archaeology, and who had only gradually settled on North America as my geographic focus, picking a focus on entering graduate school was a hard task. There was so much that would be interesting to study! However, I did remember especially enjoying a research paper I had done in college on the relatively new interdisciplinary field of zooarchaeology, so under pressure, I told my professors I wanted to pursue this subfield in graduate school. Amazingly, this turned out to be a good choice of specialization for me. I found that I really love to work with collections of animal bone. For me, opening a bag of bone refuse from a site still is exciting. Bone identification work is a little like doing a jigsaw puzzle without all the pieces. It is challenging, and it takes concentration and careful observation to piece together what you can. There is so much to figure out about any single piece of bone! What animal is it? How healthy was the animal? What part of the animal’s body is it? Has it been burned or cut? How was the bone buried and changed after the humans were done with it? Then you have to record this information so it can be combined with other observations on the assemblage of bone you are looking at. After identification, making sense of what a collection of the bones means and correlating these kinds of data with other information from a site and region requires careful analysis, but also insight and creativity. To me it is endlessly fascinating.

Besides finding that I liked the work, choosing zooarchaeology was also serendipitous since my professors were looking for a student to work with them on this aspect of a big project they were undertaking in west-central Illinois centered on the Koster site, which was first inhabited more than 9000 years ago and then reinhabited by people right up into modern times. Most importantly the poorly known Archaic Period levels were numerous, well-preserved, and distinct from each other so we could add a lot of new information through our work. For my dissertation I was able to look at the animal remains from levels of this site dated between approximately 8500 and 6000 years ago, which represent how people used animals at that time.

Koster site strata. All those dark layers are from Archaic period camps at the site. Photo credit: Del Bastian, Center for American Archaeology.

Graduate school was intense, but I continued to be fascinated by archaeology’s ability to tell the story of people lost to standard Western history. In those days I was excited to be part of this science that could do so much more than describe and take care of cool artifacts. It was a heady thing to learn that I could contribute to what was known about people who lived thousands of years ago. In later years, I’ve had to think more critically than I did then about what a privilege it is for an archaeologist to learn about the history and lives of other ethnicities. Today’s archaeologists recognize their responsibility to present information about past people for both scholarly and public use in ways that are sensitive to what is considered sacred and private by the descendants of those people. I think this is an important change in perspective, but in the 1970s most archaeologists just wanted to show that people’s stories from the past could be told using the techniques of archaeology. I certainly was happy, if a little naively so, to have found a way to contribute to telling the human story.

If I consider entering graduate school as the start of my professional career as an archaeologist, I have been pursuing this career for more than 45 years! Over the years I have done zooarchaeological and archaeological work in the American Midwest, Southwest, Southeast, and Northeast working on telling the story of people who lived as long as 9000 years ago and as recently as the Sixteenth century. I’ve worked at several universities, in a small museum, and on small and large archaeological projects in the field of Cultural Resource Management (CRM) doing archaeological survey, site excavation, and zooarchaeological identification and analysis. I’ve written scholarly papers and articles as well as a textbook on North American archaeology. However, beginning in the late 1980s, I spent more than 31 years doing research and teaching anthropology and archaeology here in Pennsylvania at Indiana University of Pennsylvania. In this job I taught both undergraduates and graduate students, but, as is typical of university professors, I also spent time doing fieldwork and analysis as part of my research while at IUP. Fortunately, because archaeology is a team undertaking, I’ve been able to involve many students in my research. Working with students in research as they discover what fascinates them has been a highlight of being an archaeologist for me. I’ve now retired from teaching but not archaeology. I’m still working with both physical and digital archaeological collections both through CMNH and elsewhere and writing about archaeology. Who knows what this career still will bring me!

Drawing a profile at the Johnston site with one of my students in 2008. Photo credit: Erica Ausel, IUP Archaeology.
Tracking down a bone identification with one of my students in the Zooarchaeology Lab at IUP. Photo credit: Beverly Chiarulli.

If you are reading this blog because you are thinking about archaeology as either a career or a hobby, I hope you realize that mine is just one story among the many that could be told. Because there are so many aspects of archaeology, people come into it from all sorts of backgrounds and because of all sorts of interests. I think that it is important to remember though that it really is about understanding people and telling their stories through the artifacts and other evidence we find. This is what interested me in archaeology in the first place. Discovering the details of the human story is a giant undertaking. There is no shortage of research problems or work to do, but solving the puzzles presented by sites and collections is both challenging and fun. I’m certainly glad I decided to become an archaeologist and zooarchaeologist so many years ago!

Sarah W. Neusius is a Research Associate in the Section of Anthropology at Carnegie Museum of Natural History and Professor Emeritus, Department of Anthropology, Indiana University of Pennsylvania. Museum employees are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Definitions of Bolded Terms

anthropology -the study of humans including the physical, cultural and social aspects in the past and present.

cultural anthropology – the study of the cultural aspects of humans especially recent and contemporary social, technological, and ideological behavior observed among living people.

biological anthropology – the study of the biological or physical aspects of humans, including human biological evolution and past and present biological diversity.

linguistic anthropology – the study of the structure , history, and diversity of human languages as well as of the relationship between language and other aspects of culture.

archaeology – the study of past human behavior and culture through the analysis of material remains.

ethnographic – relating to the scientific description of people and cultures especially customs and beliefs.

Mesoamerican archaeology – the archaeology of the area from central Mexico southward through Belize, Guatemala, El Salvador, Honduras, Nicaragua, and northern Costa Rica.

North American archaeology – the archaeology of the area from central Mexico northward throughout the United States and Canada.

zooarchaeology – a subarea of archaeology involves the identification of animal remains from archaeological sites and investigates the ecology and cultural uses of the animals represented.

assemblage -a collection of artifacts from the same archaeological context.

Archaic Period – a time period from approximately 10,000 BP to 3000 BP that is recognized in most of North America.

Cultural Resource Management (CRM) – an applied form of archaeology undertaken in response to laws that require archaeological investigations.

archaeological survey – the systematic process archaeologists use to locate, identify, and record archaeological site distribution on the landscape.

Related Content

Pennsylvania Archaeology and You

Ancient Egypt Through its Pottery

Super Science Coloring Pages

Filed Under: Blog Tagged With: anthropology, Archaeology Extravaganza, Sarah Neusius, Super Science

March 3, 2021 by wpengine

Pennsylvania Archaeology and You

The Pennsylvania Archaeological Council (PAC) is an organization of professional archaeologists from all over the State dedicated to education, consultation, ethics, and advocation of Pennsylvania archaeology. The PAC works to advise policy and legislative interests in the commonwealth as well as provide consultation with the Pennsylvania Department of Transportation. Anyone with a graduate degree in anthropology, archaeology, or a similar subject is encouraged to apply. Recently this membership has been expanded to include those with extensive experience and PAC has taken an interest in student membership. Check out this website for more information.

outline of the state of Pennsylvania with the letters PAC on it diagonally

For anyone interested in local archaeology, the Society for Pennsylvania Archaeology (SPA) exists alongside PAC. Anyone is welcome to join this special interest group that is made up of regional chapters. Established in 1929, the goals of SPA include; promoting the study of archaeological resources in PA, discouraging irresponsible exploration, connecting avocational and professionals, and promoting the conservation of sites, artifacts, and information. To disseminate information, the SPA facilitates one of the oldest State Archaeology Journals, Pennsylvania Archaeologist. 83 years of the publication are available for purchase on the website.

The Society for Pennsylvania Archaeology, Inc., the parent archaeological society, meets annually at announced places. Membership in the SPA is highly recommended. Dues are $30 per year for individuals. Membership entitles one to receive The Pennsylvania Archaeologist twice a year. For those interested in taking an active role, the SPA is made up of many individuals from regional chapters. I’ve decided to highlight two of those chapters in this blog. To find your regional chapter visit pennsylvaniaarchaeology.com/Chapters.htm

If you live in Pittsburgh, our local chapter is called Allegheny Chapter #1. We meet the first Tuesday of every month at 7:30 p.m. Due to the pandemic, this is currently done virtually. For membership information contact Amanda Valko at amanda@quemahoning.com The chapters take an active approach by conducting investigations of sites in their region. The Allegheny Chapter started working on a local site called the Hatfield site back in July of 2007. The first thing we did was set up a grid and took some geomorphology samples under the direction of Brian Fritz.

Brian Fritz and Nina Larsen examining a soil core sample at the Hatfield Site. (Photo Credit: Amanda Valko)
Setting up the grid for soil sampling. Chapter members front to back: Brian Fritz, Peggy Sinclair, Ken Fischer. Chapter members under the shade shelter: Don McGuirk, Nina Larsen. (Photo Credit: Amanda Valko)

The Allegheny Chapter is hoping to produce a report of these excavations soon. Hopefully we can get the Chapter together over the summer to work with the artifacts and start the whole report preparation process.

Southeast of Allegheny County, the Westmoreland Archaeological Society Chapter #23 used to meet on Wednesdays, but due to the pandemic are following an erratic schedule. For membership information contact Jim Barno at bar3686@calu.edu (Jim Barno is a dedicated volunteer in the section of Anthropology at CMNH.)

Chapter #23 was actively engaged in 16 years of excavation at the Console Site, which was an important Monongahela Site. They reach out to the students and faculty at the Indiana University of Pennsylvania encouraging them to become involved with the Westmoreland Archaeological Society by participating in various public events such as artifact displays and colloquiums held at the IUP campus, Fort Necessity National Battlefield, Green County Historical Society as well as local community events such the Derry Agricultural Fair.

IUP students are actively involved in continuing excavations at the Bergstrom Hollow Rock Shelter Site (weather permitting). The chapter also publishes a monthly newsletter called The Trowel that has interesting archaeological subject material as well as listings of local archaeological events and now Zoom links for folks interested in these types of activities.

From the left are the following people Stephanie Zellers, Rachael Smith, Bob Oshnock, and Dr. Chadwick at the Bergstrom rock Shelter. (Photo Credit: Jim Barno)
Earth Day Event at St. Vincent College. Bob Oshnock and Dr. Lara Homsey-Messer (IUP) doing flotation. (Photo Credit: Jim Barno)

Remember to always report archaeological finds to the State Historic Preservation Office! Follow the guidelines specified in the links below.

PA SHPO/State Museum of PA: Instructions for Recording Archaeological Sites in Pennsylvania

PA State Historic Preservation Office (PA SHPO): Guidelines for Archaeological Investigations in Pennsylvania

Amy L. Covell-Murthy is Archaeology Collection Manager at Carnegie Museum of Natural History as well as a member of the SPA Allegheny Chapter 1, and a recently elected executive board member of the PAC. Museum employees are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Related Content

Archaeological Adventures in Egypt

Minecraft Lied to Me?!

Super Science Activity: Hieroglyphs

Filed Under: Blog Tagged With: Amy Covell-Murthy, archaeology, Archaeology Extravaganza, Educators, Super Science

January 27, 2021 by wpengine

Detecting Objects with Invisible Waves: Using Radar, Sonar, and Echolocation to “See”

The ability to see visible waves of light can be beneficial for determining the size, shape, distance, and speed of things in our surrounding environments. But in many situations, reliance on sight might not be the best option for the remote detection of objects. For example, most animals do not have eyes on the backs of their heads; many cannot see very well at night; and some live in the depths of the ocean where visible light doesn’t reach. Yet these conditions don’t hinder the ability to sense objects for many animals. So, how do humans and other animals “see” distant objects without depending on the use of sight?

One answer is that other types of waves outside of visible light exist and animals have developed methods for detecting them. Two of these methods, sonar and radar, are man-made detection systems that allow us to “see” what our eyes can’t. The other, echolocation, is a natural way for some animals to detect motion through sound waves.

Radar

Radar is a system used to detect, locate, track, and recognize objects from a considerable distance. R.A.D.A.R is an acronym for “radio detection and ranging.” It was initially developed in the 1930s and 1940s for military use, but is now common for civilian purposes as well. Some of these uses include weather observation, air traffic control, and surveillance of other planets.

air traffic control radar with blue circles and airplanes on black background
Air traffic control radar.

Radar works by sending out radio waves, a type of electromagnetic wave, in pulses through a radio transmitter. The waves are reflected off of objects in their path back toward a receiver that can detect those reflections. Radar devices usually use the same antenna for transmitting and receiving, which means the device switches between being active and passive. The received radio wave information can help observers determine the distance and location of the object, how fast it is moving in relation to the receiver, the direction of travel, and sometimes the shape and size of the objects, too.

Radio waves have the longest wavelengths and lowest frequencies of all electromagnetic waves. Because they move slower and require less energy, they travel well through adverse weather conditions like fog, rain, snow, etc. Detection systems like lidar that operate through infrared and visible waves with shorter wavelengths and higher frequencies do not function well in such conditions.

While radar can effectively move through or around various environmental conditions, it is much less effective underwater. The electromagnetic waves of radar are absorbed in large bodies of water within feet of transmission. Instead, we use Sonar in underwater applications.

Sonar

S.O.N.A.R, an acronym for “sound navigation and ranging,” is a similar system to radar in terms of transmitting and receiving waves through pulses to determine distance and speed. However, it functions through the use of sound waves and is highly effective underwater.

Sound waves are mechanical waves, which means they are oscillations, or back and forth movements at regular speeds, of matter. When a mechanical wave strikes an obstacle or comes to the end of the medium it travels in, some portion of the wave is reflected back into the original medium. Water turns out to be a fantastic medium – albeit a slow one – for carrying mechanical waves long distances, making Sonar the top choice for underwater object detection.

Echolocation

Echolocation is a natural sound wave transmission and detection method used by animals to accomplish the same goal of object detection. Though sometimes referred to as sonar in casual conversation, echolocation requires no human-made device to function and is used both above and below water. Animals use echolocation by sending out sound waves in the air or water before them. They can then determine information about objects in their path through the echoes produced when those sounds are reflected.

Echolocation can be utilized by any animal with sound-producing and sensing capabilities. Humans have been known to develop methods of systematically tapping canes or clicking their tongues to produce the sounds needed for echolocation. However, echolocation is more generally associated with the use of ultrasound by non-human animals. Ultrasound is sound that has a mechanical wave frequency higher than the human ear can detect though they operate the same as audible sound waves.

bat flying

Bats are among the most well-known users of echolocation. They use relatively high, mostly ultrasonic wavelengths and some can create echolocating sounds up to 140 decibels – higher than a military jet taking off only 100 feet away. In order to handle such intense sound wave vibrations, bats turn off their middle ears by just before calling to avoid being deafened by their own calls. They use muscles in their middle ear to pull apart bones that carry sound waves to the inner ear leaving no path for the sound waves to damage the cochlea. Similar to radar devices switching between active transmitters and passive receivers, Bats restore their full hearing a split second later to listen for echoes.

Most of the more than 1300 species of bats use echolocation to hunt and navigate in poor lighting conditions. Fossil evidence indicates that this capability developed in bats at least 52 million years ago. They can detect an insect up to 15 feet away and determine its size, shape, hardness, and direction of travel through their skillful use of echolocation.

Wave Echoes

Animals have long been able to detect objects at a distance through the manipulation of nonvisible waves using technologies like radar and sonar or natural echolocation. Though each of these methods operates a little differently and relies on various shapes, sizes, and types of waves, they each work by emitting waves then determining characteristics based upon the echoes of those waves.

Try it at Home

Go to a corner of a quiet room and close your eyes. Without moving your body too much, try turning your head while making clicking noises with your mouth. Can you tell when you are turned more toward a wall or if there are any objects near you through the way the clicking sound changes? Try holding your hand up in front of your face and moving it back and forth while you click. Can you tell how far away it is or which direction it is moving by the sound? Get creative and try it with different types of objects and different locations!

Jane Thaler is a Gallery Experience Presenter in CMNH’s Life Long Learning Department. Museum staff, volunteers, and interns are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Related Content

Super Squid! Flying Marvels of the Natural World

Fancy Feathers: An Unexplained Complexity in Evolutionary History

Ask a Scientist: What’s the difference between ravens and crows?

Filed Under: Blog Tagged With: Museum from Home, Super Science, Taking Flight

January 26, 2021 by wpengine

Fancy Feathers: An Unexplained Complexity in Evolutionary History

One of the most complex and highly intricate wonders of the flying world owes nothing to DaVinci’s studies on mechanical flight, the Wright brothers’ pioneering of aviation, or any other human-derived aeronautic technology. The most sophisticated piece of engineering used for flight has its origins in the Age of Dinosaurs and is one of the most common sights in our everyday lives: feathers.

Feathers as We Know Them

Modern-day feathers come in a seemingly infinite variety of sizes, shapes, and textures. Though their diversity is immense, each type is made of beta-keratin, a structural protein found in the skin of both reptiles and birds, and their branching structures have the same basic parts. The main shaft is composed of a hollow barbless base, known as the calamus or quill, and a central shaft, called the rachis. The rachis branches into main barbs and they branch even further into barbules.

illustration of feathers showing the quill, rachis, barb, barbule, and hooks

The variety of feathers comes from small modifications to this basic branching structure to serve different functions. Feathers fall into a few general categories, which will be briefly describe here, and many more specific subcategories.

illustration of six feathers from longest to shortest: Tail, Flightl, Semiplume, Filoplume, Bristle, and Downy

Bristles have a simple, stiff, and tapered rachis with few barbs. They are usually found on a bird’s head around their mouth, nostrils, and eyelids. Some experts think they are for protection much like eyelashes, others believe they serve a sensory function as evidenced by the nerve endings found at their base, and many support both theories.

Filoplumes are also simple and mostly bare of barbs except a tuft at the tip. They are found near contour feathers. Given their placement and the presence of unmyelinated nerve fibers, which are those that support peripheral sensory functions in their base, filoplumes act like whiskers by sensing the position of contour feathers.

Semiplume and down feathers are mostly hidden underneath outer feathers. Their loose branching structures appears fluffy and is highly effective for insulation.

Contour feathers include those that cover the surface of the bird. As their name suggests, these feathers follow the shape of the body, streamlining and weatherproofing it along the way like overlapping shingles. From the central shaft extends a series of slender barbs, each sprouting smaller barbules that are lined with tiny hooks. When these grasp on to the hooks of neighboring barbules, they create a structural network that is almost weightless yet remarkably strong. As the outer visage, these feathers also support decoration and camouflage.

Contour feathers also include the amazing evolutionary innovations mentioned in the introduction: flight feathers. Flight feathers are long, stiff, asymmetrically shaped, but symmetrically paired feathers on the wings or tail of a bird. They are built for durability, shaped for precision, and combined with musculature to produce the ultimate flying tool. The wing feathers, known as remiges, have uniform windproof surfaces, or vanes, on either side of the central shaft created by the interlocked hooks found on the barbules. These feathers are asymmetric with a shorter, less flexible leading edge that support stability and maneuverability. Similarly structured tail feathers, known as retrices, are arranged in a fan shape that allows for precision steering during flight.

While we can simulate some of these characteristics with our flying technologies, we have yet to create a machine that is as versatile, efficient, and effective as bird feathers in flight. Even more impressive, birds are not stuck with one set of feathers for their whole lives. Damaged or worn feathers can be replaced through the process of molting. During a periodic molt, old feathers are shed and new ones grow in their place keeping birds in top flying shape. You can’t say that about any of our manmade flying machines.

The Question of the Evolution of Feathers

avian fossil

The consensus among paleontologists is that birds, known taxonomically as the class Aves, are a group of maniraptoran theropod dinosaurs. Evidence found in the fossil record suggests that most major lineages of modern birds arose near the end of or right after the Cretaceous period (between 65-60 million years ago). Feathers now exclusively occur in avian dinosaurs (e.g., birds), but that was not always the case. With the discovery of the bird-like dinosaur Archaeopteryx in the 1860s and confirmed with further feathered dinosaur discoveries in the 1990s, feathers have been found on much earlier, non-avian species suggesting that their evolutionary beginnings stem at least as far back as the Jurassic.

illustration of feather evolution from the Triassic to Cenozoic

Several theories have been explored and subsequently unraveled in recent years regarding the origin of birds and the evolution of feathers. Once the link between birds and reptiles was evidenced, some scientists theorized that birds did not evolve from dinosaurs. Instead, they are related by a distant common ancestor that has yet to be discovered. This theory, however, does not account for the striking similarities between the skeletons of birds and those of the highly feathered theropods.

Others theorized that maybe scales and feathers were both flat because feathers were an elongation of scales with frayed edges that eventually became the feathers we see today. They supposed that this growth over generations could have been prompted as an adaptation for flight. Maybe they helped these reptiles live in tree canopies by aiding gliding, which turned into the capability of flight. Such a “feathers-to-flight” theory would nicely tie up answers to all of the questions posed above and was fairly long-lived. With the discovery of hundreds of feathered, ground-running theropods, however, this theory proved to be discardable. So, too, dinosaurs far removed from theropods and even further removed from birds have been found with feathers that were not used for flight.

illustration of Caudipteryx

The feathers on the earliest non-avian dinosaurs did not look like the modern-day feathers described above. This fact has led to a new line of thinking about the transition from scales to feathers. From what we know from the fossil records, the earliest feathers, sometimes called protofeathers, were small, hollow filaments that appeared more like fuzz than feathers. Studying feathered specimens chronologically, the feathers slowly became more and more complex over time possibly because of an evolutionary impetus. The study of this feather development has prompted a new look into the genomic manipulation of placodes. Integumentary placodes are embryonic structures involved in the development of hair follicles, feathers, and teeth. Recent studies using modern genomic methods to identify feather-associated placodes have demonstrated the ability to turn scales into feathers. By turning key molecular circuits on and off at critical stages of scale development, researchers have been able to stimulate feather-like growths in alligator skin cells.

placodes

Though interesting, indeed, and something to keep an eye out for in new studies, none of this research is conclusive. Other studies suggest that convergent evolution might solve some of these riddles or more digging for fossils might be the best option. In any case, there is still much to learn about how the feathered dinosaur that you watch at your birdfeeder or hear outside your window evolved into what it is today.

Jane Thaler is a Gallery Experience Presenter in CMNH’s Life Long Learning Department. Museum staff, volunteers, and interns are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Related Content

Ask a Scientist: How are birds like dinosaurs?

Super Science Activity: DIY Catapult

Snow White Bird Search

Filed Under: Blog Tagged With: Museum from Home, Super Science, Taking Flight

January 25, 2021 by wpengine

Super Squid! Flying Marvels of the Natural World

Look up in the sky—it’s a bird! No, a plane! It’s…it’s…a squid?!  Most people wouldn’t expect a squid to fly, but truth is sometimes stranger than comic book fiction. The natural world is full of wonderful surprises, including many creatures that seemingly have no business being airborne. They can live in very different habitats, ranging from beneath the ocean waves to high up in the tree tops of a rainforest. Yet all these animals have expertly managed to adapt to their environments and utilize flight as a successful survival tool.

Flying Mammals

Wouldn’t it be a strange world if mice and rats could fly? Besides being a housecat’s worst nightmare, this notion also seems unbelievable. But out in the amazing world of wildlife, this isn’t so far from the truth! Gliding mammals can be found around the globe, from the tiniest of these arboreal aerialists, the Mighty-Mouse-sized Feathertail Glider, which lives in Australia, to the largest, the 16-inch-long Colugo, sailing through the tree tops of the rainforests of South East Asia.

The Southern Flying Squirrel (also called the assapan) measures 10 inches long from nose to tail and covers a wide range of the eastern side of North America. It lives in the deciduous forests that stretch from Southeast Canada to Florida. Their habitat is like that of the Gray Squirrel, but we often don’t see them because they’re nocturnal.

These squirrels are nocturnal, and eat a variety of fruits, nuts, insects, spiders, flowers, and seeds. They’ll also eat bird eggs and gastropods like snails and slugs!

Flying squirrels, like all gliding mammals, has specialized flight gear that enables it to take to the skies. This unique flying tool is called a patagium, which is a stretchy cape of loose skin that starts at their wrists, extends along their body, and attaches at their ankles. To become airborne, they usually like to take a running start from a tree top. But they can also take off from a stationary jumping point by pulling in their limbs and head close to their body. Then, like releasing energy from a coiled spring, they push off and propel into the air. Once they’re in the air, they stretch out their arms and legs to create an “X” shape with their body. This causes their patagium to billow up and stretch into a square shape. This allows them to turn into furry little pilots, expertly maneuvering around obstacles and trees. They can even manage to make last- second, hair-raising 90-degree turns!

When preparing to land, they raise up their flattened tail, which acts like the stabilizer on a kite or airplane. This allows them to adjust their trajectory and hone in on their landing site. By pulling their limbs in front of them, the squirrel’s patagium transforms into a parachute and slows them down when they reach the limb of their choice. Although they’re clumsy walkers because of their patagium, the Southern Flying Squirrel’s ability to glide is an effective adaptation for traveling long distances, and a great tactic for evading predators.

Flying Reptiles

It’s not just mammals that can sail through the wild blue yonder; reptiles have their superhero moments, too. When you think of a flying reptile, the first thing that might come to mind is a menacing winged serpent or dragon out of some mythical Medieval legend. But these captivating creatures don’t just live in the land of fairytales—they inhabit our world, too. The Draco Lizard, also called the Flying Dragon, makes its home in the jungles of Southeast Asia and Southern India. Measuring a mere 8 inches from head to tail, it’s astounding that they can fly through the forest for up to 100 feet! They accomplish this by using folds of skin that rest against their body. When unfurled, this skin acts as wings. This tiny “dragon” can travel quickly from tree to tree using their wings for lift and their long, slender tail for steering. Their airborne expediency is very useful for avoiding danger, finding mates, and tracking down meals.

You wouldn’t think this little lizard could be airborne, but they can glide distances up to 10 times their body length!

Another gliding reptile is the nocturnal Flying Gecko, which lives in the tropical forests of Malaysia, Thailand, and Indonesia. Measuring up to 8 inches, they can fly for up to 200 feet! They have special webbing that surrounds their neck, limbs, feet, trunk, and rudder-like tail. When the gecko stretches itself out, this webbing acts as flaps that create surface area and generate lift.

Lastly, there is one brave reptile that seems to break all the rules of flight and aerodynamics. It’s the flying snake. There are currently five recognized species, and they range from Western India to Indonesia. Scientists are not quite sure why snakes fly. Maybe it’s to escape predators, hunt prey, or quickly move from tree to tree. Whatever their reasons, it is an amazing sight to see. The Paradise Tree Snake of Southeast Asia will slither to the end of a branch, dangle in a J shape, then spring off using the lower half of its body. Then they use the speed of free fall to fly. In midair, it flattens its body into a concave “C” shape to trap air and provide lift. As it glides, it undulates side to side in an “S” shape. This action increases stabilization so that it can cover more horizontal distance. No other gliding animal maintains stability like this. At just 4 feet long, the Paradise Tree Snake can fly for up to 330 feet! It’s quite an achievement for a reptile with no legs or wings.

Flying Sea Life

Most people think that dolphins and whales are the only aquatic acrobats of the animal world. But there are many other sea creatures that peek above the ocean waves from time to time. Perhaps you’ve heard of the flying fish. There are 40 known species that inhabit the Atlantic, Pacific, and Indian Oceans. Their streamlined, torpedo-shaped bodies can be as long as 18 inches. They’ll rapidly beat their forked tails to break the water’s surface and propel themselves through the air at 35 miles per hour. Using their unusually large pectoral fins as wings, they can glide for up to 655 feet before re-entering the water. It’s an astonishing feat that seems incomparable, but there has been a recent discovery of another flying marvel of the seas…Super Squid! All joking aside, this mollusk is called a flying squid. Scientists think that there are possibly dozens of species of squid that can fly, some of which are the Neon Flying Squid, the Orangeback Squid, and the Argentine Shortfin Squid.

Although there are several different species of flying squid, they most likely all evolved their mantles and funnels similarly for the most effective speed and aerodynamics when airborne.

A flying squid launches itself out of the water like a rocket by using its mantle and funnel. A mantle is a cloak of soft, muscular tissue that surrounds its body. When the squid contracts its mantle, it sends water shooting through the funnel, a tube below its head. It blasts out of the water like a jet and can travel as far as 100 feet in 3 seconds and fly as high as 10 feet above the water’s surface! It glides by spreading out its fins and flapping. But it also forms wings by spreading out its tentacles in a radial pattern. A membrane between their tentacles enables them to catch air, and this creates lift. Upon re-entry into the water, the squid folds back its fins and dives under the waves. Scientists have observed groups of over twenty squid flying together, and they’ve noticed that the squid don’t just glide passively. They change posture based on their distance from the water and their phase of flight. Scientists also think, more than likely, squids fly as a defense method for predatory escape.

So, the next time you’re outdoors, take a moment to look up into the sky and imagine seeing a snake, a squirrel, a lizard, or a squid sailing high above your head. It’s seems utterly inconceivable, but these amazing animals really do exist. And no, none of them wear a little red cape and have an “S” on their chest. And they’re not able to leap tall buildings in a single bound. But that doesn’t make their gravity-defying feats of flight any less super.

Shelby Wyzykowski is a Gallery Experience Presenter in CMNH’s Life Long Learning Department. Museum staff, volunteers, and interns are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Related Content

Flying Snakes? Unique Reptile Adaptations

Stuffed Animal Safari: Giraffe

A Hop, Skip, and a Stomp

Sponsors

Super Science Saturdays are sponsored by PA Cyber and Tender Care Learning Centers, a proud partner of Carnegie Museums of Pittsburgh. PAcyber The Pennsylvania Cyber Charter School LogoTendercare Learning Center logo

Filed Under: Blog Tagged With: Super Science, Super Science Days, Taking Flight

December 18, 2020 by wpengine

A Hop, Skip, and a Stomp

The Lebanese are known for their love of music, songs, and dance. The most well-known and traditional Lebanese dance is called Dabkeh or “stomping of the feet.” It is a tradition that has been taught and passed down for centuries and has withstood the trials of migration as it lives on through the children of Lebanese immigrants.

painting of six people dancing in a line

The history of the Lebanese Dabkeh goes back to olden days when snow used to cover the roofs of the houses in the tight-knit Lebanese villages. The snowfall would be so great, that in order to protect the roofs of the houses from cracking, the villagers would form a line on the roofs and stomp on the snow/mud while yelling “Alawneh” which means “let’s go and help.” This then turned into “Ala Dalouna” and spurred many songs with that lyrics and title. The villagers had to be unified and on rhythm with their moves to effectively stomp the snow off. It wasn’t long before this practice, born out of necessity, turned into one of the richest aspects of Lebanese culture.

drawing of someone dancing dabke

The villagers would stomp their feet to the music of the various woodwind and percussion instruments associated with the melodies of Dabkeh, like the mijwiz (double flute). Nowadays, the mijwiz is still the main instrument, in addition to the derbakeh (hand-held drum), that provides energetic beats to every spontaneous gathering in Dabkeh.

In a way, dancing Dabkeh helped those villagers stay warm through the bitter cold of the winter and sheds light on the innate characteristic of the Lebanese community to help one’s neighbor. We see that reflected beautifully in the Dabkeh line as it starts from right to left, with everyone holding hands, stomping their feet to the beat of the music, and keeping a unified rhythm. The world is our dance floor!

The standard Dabkeh step is rocking back and forth from your left foot, in the front, to your right and stomping your left foot twice. You can even spice up the basic steps with some hops and turns. Normally, the Dabkeh line has a leader who can make more artistic and difficult steps while holding a masbaha, or beads line, handkerchief, or stick, and controls the energy and tempo of the line. You could also be like me, and compliment or challenge the leader by being their second in line or dancing outside of the line altogether.

group of people dancing dabke

My holidays can usually be associated with beautiful random outbursts of song and dance and Dabkeh is at the center of it all. It may have begun in snow-piled villages but it has blossomed into a dance for all seasons and occasions. I dance Dabkeh holding the traditions of my people in my heart with the goal of sharing that lively energy with the rest of the world.

Tamara Alchoufete is a Work-Study student from the University of Pittsburgh and works in CMNH’s Section of Anthropology at the Edward O’Neil Research Center. Museum staff, volunteers, and interns are encouraged to blog about their unique experiences and knowledge gained from working at the museum.

Related Content

Tuscarora Nu Yah

Snowstorm in a Jar Activity

Waddling in a Winter Wonderland

Filed Under: Blog Tagged With: HATW, Super Science

  • « Go to Previous Page
  • Page 1
  • Page 2
  • Page 3
  • Page 4
  • Go to Next Page »

sidebar

About

  • Mission & Commitments
  • Directors Team
  • Museum History

Get Involved

  • Volunteer
  • Membership
  • Carnegie Discoverers
  • Donate
  • Employment
  • Events

Bring a Group

  • Groups of 10 or More
  • Birthday Parties at the Museum
  • Field Trips

Powdermill

  • Powdermill Nature Reserve
  • Powdermill Field Trips
  • Powdermill Staff
  • Research at Powdermill

More Information

  • Image Permission Requests
  • Science Stories
  • Accessibility
  • Shopping Cart
  • Contact
  • Visitor Policies
One of the Four Carnegie Museums | © Carnegie Institute | Privacy Policy | Terms of Use | Accessibility
Rad works here logo