When Allan Snyder discovered that transcranial magnetic stimulation produces strange cognitive changes, he believed he'd stumbled upon a "creativity-amplifying machine." Learn more about the real-life thinking cap in this podcast from HowStuffWorks.com.
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Short Stuff: Toronto Clown Riot
12:22

The Hillsborough Disaster
46:19

Selects: How Enron Fooled the World
59:59