Scientists study many fossils of all sorts of past creatures and plants. What do these fossils share about their history? [30:00]

What makes a species likely to go extinct? What makes some species stick around longer than others? This webcast will investigate these questions. [31:30]

A video narrated by Neil deGrasse Tyson that explores what caused the Permian extinction, the mother of all extinctions, 250 million years ago? [13:14]

This video segment from Evolution: "Extinction!" shows the impact of invasive species on native ecosystems. [3:23]

BackStory Radio episode in which the American History Guys explore how American thinking about extinction has developed and factored into the American psyche. The audio and transcripts are available.

What can we learn from volcanic ash in Laetoli? Sanjayan discusses human interaction with the biosphere and how we are reconnecting with nature. [6:20]

Geologist Walter Alvarez gets to the bottom of a scientific murder mystery. [7:28]

An interview with biologist Paul Ehrlich to discuss the possibility of a sixth mass extinction event in the not too distant future, due to the severe biodiversity loss that scientists are witnessing. They discuss whether anything can be...

Scientists discuss their ideas about what led to the extinction of Ice Age animals. Aired Sep. 28, 2007 [7:44]

See how the environment changed during the late Cretaceous Period, the last days of the dinosaurs. [3:59]

Follow the making of the BBC documentary 'Walking with Dinosaurs' and learn how experts developed an understanding of dinosaur movement by following the movements of large animals alive today such as elephants. [5:17]

This lesson will explain the basic concepts of response chaining, shaping and extinction in operant conditioning & how operant conditioning occurs through examination of B.F. Skinner's box experiment.

"A scanning device most commonly seen in hospitals is reshaping the science of paleontology by allowing researchers to peer inside irreplaceable fossils without damaging them." Find out what scientists are now able to see that they've...

The U.S. Fish and Wildlife Service proposed moving 23 animals and plants off the endangered species list, declaring them extinct. Perhaps the most well-known of the species deemed gone forever is the ivory-billed woodpecker. These...

Hank takes us on a trip through time to revisit the five major mass extinction events that have impacted species over the Earth's history, and leaves us with some thoughts about what could possibly be the sixth event - the one caused by...

You've probably heard of Charles Darwin, but how did scientists before him form their theories about life, evolution, and extinction? Learn how different people in the seventeenth and eighteenth century tried to answer the question -...

How common is species extinction? Some is always happening. But over geologic time, biodiversity has increased despite several mass extinction events. Humans are now driving a mass extinction of biodiversity. [12:21]

This video [5:34] discusses the concepts of classical conditioning [repeated over time], generalization, extinction [used to rid of fears, and spontaneous recovery.

Wildlife on Earth is disappearing. Today, over 20,000 species are on the verge of dying out, but we simply don't have the time or resources to rescue them all. It's a tough situation but not a unique one. In this video you will learn how...

Presentation of an emerging theory that explains the mass extinction of life that occurred at the end of the Permian period. [4:51]

Many scientists attribute the world's great extinction events to major catastrophes such as asteroid strikes and massive volcanic eruptions. We'll talk with researchers exploring an alternate theory - that massive algal blooms led to...

Provides 10 dinosaur facts you might not know.

Climate, pollution, loss of habitat -- what are the leading causes of modern extinctions?

Some scientists are challenging the conventional wisdom that dinosaurs abruptly disappeared because of a huge crater created by an extraterrestrial impact in the Gulf of Mexico. Find out about this challenge and what they're saying about...