Channel: Scientific American Space Lab
Category: Science & Technology
Tags: eggheadscientific americanplanetcometsciencemeteorvsspaceversusasteroidinstant
Description: If you answered, "one of Santa's reindeer" and "a popular video game from the '80s"--this episode of Instant Egghead is for you. This story was originally published on ScientificAmerican.com on May 14, 2012.