Robert Sapolsky -- one of the world's leading neurobiologists, a MacArthur Fellow, Stanford professor, and author of Why Zebras Don’t Get Ulcers -- breaks down an intriguing question. Precisely in what ways are we (humans) different from other animals inhabiting our world? The differences are fewer than we think. But there are some, and they'll make you sometimes uncomfortable, sometimes a little more confident in humanity, and sometimes motivated to change the world, even in these cynical times. The inspiration happens during the last minute. So stay with this engaging talk until the very last.