Not having a permanent address or access to identifying documents can make voting in U.S. elections nearly impossible. Learn more about these challenges -- and what some organizations are doing to help -- in this episode of BrainStuff.

What Pranks Have Astronauts Pulled?
08:40

How Can Your Body Learn to Tolerate Cold?
10:58

How Did the War of 1812 Settle the American Revolution?
10:23