Thanks to everyone who tuned in to watch our first-ever Google Hangout. We had a blast!

Alan Turing's mental leaps about machines and computers were some of the most innovative ideas of the 20th century. But the world wasn't kind to him. In this short, Robert wonders how Turing's personal life shaped his understanding of mechanical minds and human emotions.

In the late 1800's, mathematicians fantasized about a machine that could answer any math question at all. But Steve Strogatz explains -- by way of Sesame Street and a thought experiment involving a conflicted barber -- that their dreams were dashed by a scrawny little German guy. Then, theoretical ...