New ReviewWe've heard about pygmy pigs—why not pygmy mammoths? Fossil evidence proves their existence, but the dilemma is figuring out where they lived. A video describes different theories on their evolution and migration.

New ReviewYou may struggle to find similarities between humans and many of our ancestors. Fossil evidence finds more and more signs of similarities between humans and many other species. A lesson outlines the fossil evidence and the questions...

New ReviewAncient fossils have many stories to tell. Scientists must use different strategies to read these remnants. A video lesson explains how archeologists use different strategies to date each specimen. The timeline of a fossil helps identify...

New ReviewWould you believe the Midwest region of the United States was once the Western Interior Seaway? An interesting presentation from the PBS Eons series describes the geography of the ancient seaway and the species that lived there. The...

New ReviewYour family get-togethers are about to become more interesting! A video lesson in the PBS Eons series describes the primate family tree that leads to the one and only—homo sapiens. Discover the fossil evidence that leads scientists to...

New ReviewTake an evolutionary journey as an ancient amphibian. A lesson from a PBS series describes the features and evolutionary sequence of a large amphibian group, the Temnospondyls. Although extinct over 210 million years ago, many current...

New ReviewJust how long can a fossil preserve DNA? It seems that DNA becomes unreadable after about 6.8 million years. Learn about the science that helped make this conclusion and the mistakes made along the way in a lesson from a PBS Eons video...

New ReviewA mass extinction event caused by an impact usually leaves a crater. Scholars use data from 10 different sites around the world trying to determine where to look for the crater. They use data, listing the amount of various minerals to...

New ReviewHow quickly do animals evolve? Can comparing different samples of the same fossil answer timeline questions? Scholars use virtual labs to examine fossils and learn about stickleback evolution. They compare pelvic morphology in lakes...

Are birds descendants of dinosaurs? Learners consider the question as they watch an informative video comparing fossil records of dinosaurs with current species. Following the video, groups ponder the evidence to draw conclusions about...

Extinction events have happen throughout geologic history, but only five mass extinctions occurred over the last 4.5 billion years. Scholars view fossils from a layer of sediment during an extinction event and observe patterns to draw...

Scientists know a great deal about extinct dire wolves thanks to a large number fossilized in one geographical area. They lived in groups, hunted opportunistic or wounded prey, and were fierce in battle and sex. Learn more with an...

Today very few animals exist with both an endoskeleton and exoskeleton. Yet, in the Devonian period, a large number of fish species lived with both. Scientists debate if they were for protection or mineral storage, because none of them...

How old is Earth and how do scientists know the answer? Throughout history, many researchers, scholars, and leaders answered this question with varying degrees of accuracy. The 20th episode of Crash Course History of Science introduces...

Volcanoes cause mass extinctions, climate change, and physical alterations of our planet. They also create great fossil records, time markers in layers of Earth, and an interesting way to study geology. A video describes how one...

Scientists believe confuciusornis developed a beak and lost teeth as a key step in the evolutionary process. Learn more about confuciusornis and other birds, dinosaurs, and animals that evolved into the birds of today. PBS Eons walks...

During the Cambrian period, almost every major life form appeared on Earth for the first time. Scientists offer multiple theories about the sudden explosion of life and diversity during this period. The Shape of Life series focuses on...

Fans of Sherlock Holmes may be surprised to learn that in addition to stories of the famous deductionist, Sir Arthur Conan Doyle is also the creator of Professor Challenger. An irascible, unpredictable scientist, Challenger was featured...

Ardipithecus ramidus shares features with both humans and chimpanzees. Learn about where Ardi, humans, and chimps fit in the tree of life by comparing anatomical features including the foot, pelvis, and teeth. After exploring those...

How did life evolve from fish to four-limbed animals? Work through an interactive exploring transition animals and comparing their features to understand the transition. Making it even better, the interactive allows scholars to isolate...

Scientists replace incorrect ideas when new evidence appears, but what happens when scientists reject the new evidence? Learn the story of the Avalon explosion and the scientists who resisted the fossils proving it existed as one part of...

One of the most abundant fossils on earth confused paleontologists for more than one hundred years. Viewers learn about the mystery and discoveries related to conodonts in a video from PBS as part of its Eons series.

Where do fossils that aren't on display in a museum go? Learn about the dinosaur collections at the Museum of the Rockies as part of the larger PBS Eons series of videos. The collections manager explains how they care for fossils and...

Change is good ... unless you're a tuatara! Meet Earth's oldest surviving reptile species in a fun video from an extensive science playlist. Content includes why the tuatara did not evolve and its unique anatomy.