Animal Behavior – CrashCourse Biology #25

Behavior is action in response to a stimulus. My cat Cameo is now responding to both an external stimulus the sound of a bag of treats, and an internal stimulus her hunger, or at least her insatiable desire for treats. Sometimes animal behavior can seem really far out, but if you look closely enough, you Read more…

How Your DNA Proves Evolution Is Real

Hey smart people. Joe here. Charles Darwin spent 5 years circling the world, to discover what became The Origin Of Species. Alfred Russel Wallace spent /8/ years traveling through South Asia to witness the story of evolution. But you can discover the same thing today, without going anywhere. Because the story of evolution is right Read more…

People of Science with Brian Cox – Sir David Attenborough on Charles Darwin

David: People of Science. Take one. Brian: David, why did you choose Charles Darwin? David: He inspires me because he made sense out of the natural world. And not only just physical sense of why animals have antlers or why birds have fine feathers, but to suggest the mechanism which led to all these multiplicity Read more…

How Earth’s First, Unkillable Animals Saved the World

640 million years ago, Earth was a totally different place. Conditions were so harsh that our world was nearly uninhabitable. Because it was, above all, very, very cold. By some estimates, the temperature at the equator could get as low as negative 43 degrees Celsius, and at the poles it got down to negative 130 Read more…

Zoology- Evolutionary Perspective

Hi all Dr. Clark here again for animal biology today we’re going to talk about zoology and kind of hit at it from an evolutionary perspective so the course will be geared towards working through animals or the animal kingdom and in doing so I will talk about the evolutionary pieces of the animal kingdom Read more…