Steven Pinker is a Canadian-American experimental psychologist, cognitive scientist and linguist that currently teaches at Harvard.
The following is a video of a lecture that he's given on his book The Stuff of Thought: Language as a Window into Human Nature. It is an interesting lecture per se, but what makes it even more special is the RSA animated version of it.
RSA is the Royal Society for the encouragement of Arts, Manufactures and Commerce and they have been taking portions of lectures by well-known professionals in various fields and animating them with cartoon drawings to accompany the speakers.
It is very entertaining, informative, and well worth the watch.