By the end of this section, you will be able to:

Explain how classical conditioning occurs
Summarize the processes of acquisition, extinction, spontaneous recovery, generalization, and discrimination

By the end of this section, you will be able to:

Define operant conditioning
Explain the difference between reinforcement and punishment
Distinguish between reinforcement schedules

Learn some facts about sawfish in this book. Includes audio narration in English and Spanish with text in English.

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

Find out about some of the theories of how the dinosaurs became extinct. [2:02]

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]

The scientific fields of paleontology, embryology, anatomy, and genetics have all contributed to a new view of the evolution of the animal kingdom. [3:42]

We think that humans are at the top of the evolutionary ladder. But is being big, brainy, and fast the best design? Evolution has produced many animals with different approaches to life. Every animal is uniquely adapted to win at the game of survival. [3:50]

There's been a lot of talk and research interest around the possibility of resurrecting certain organisms (or, at least their genomes) from extinction, with Woolly Mammoths being prime candidates for such an endeavor. But what about a closely related group, like the Mastodons? What's the criteria for possible 'de-extinction'? The Brain Scoop takes a look. [3:57]

This video from Kentucky's Last Great Places shows how the Green River has remained unusually clean and why it is home to several endangered aquatic species.

This UC Berkeley site extensively covers the death of the dinosaurs. It includes history, theories, invalid hypotheses, and current arguments.

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]