NASA's New Frontier, and the Trouble with "Gravity"

Hank describes how astronomers used a technique called gravitational lensing to find the most distant galaxy ever detected -- and how NASA is embarking on a new program to use this same technique to peer deeper into space than ever before. He also walks you through some scientific bloopers in the film "Gravity." We won't give it all away, but let's start with this: Sandra Bullock in a diaper

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S2013E170 - What Happens If You Go Without Water?