Carl Safina:

What are animals thinking and feelings?

What's going on inside the brains of animals? Can we know what, or if, they're thinking and feeling? Carl Safina thinks we can. Using discoveries and anecdotes that span ecology, biology and behavioral science, he weaves together stories of whales, wolves, elephants and albatrosses to argue that just as we think, feel, use tools and express emotions, so too do the other creatures - and minds - that share the Earth with us.

Dr. Jane Goodall:

What separates us from chimpanzees?

http://www.ted.com Jane Goodall hasn't found the missing link, but she's come closer than nearly anyone else. The primatologist says the only real difference between humans and chimps is our sophisticated language. She urges us to start using it to change the world.

Steven Wise:

Chimps have feelings and thoughts.

They should also have rights. 

Chimpanzees are people too, you know. Okay, not exactly. But lawyer Steven Wise has spent the last 30 years working to change these animals' status from "things" to "persons." It's not a matter of legal semantics; as he describes in this fascinating talk, recognizing that animals like chimps have extraordinary cognitive capabilities and rethinking the way we treat them - legally - is no less than a moral duty.