People have been telling stories about the Sandman -- named for his magic sand, which you may find crusting your eyelashes when you wake up -- for centuries. Learn some of the oldest known stories and how they may have emerged in today’s BrainStuff.
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What Do A.M., P.M., and SOS Stand For?
09:18

How Do Fainting Goats Work?
09:04

Does Smog Make Sunsets More Beautiful?
08:23