you know that slugs have 3,000 teeth and four noses? Did you know that your guts are 30 feet long? Did you know that it's impossible to breathe and swallow at the same time? Did you know that if you sit your kids down with this fascinating fact-packed app from National Geographic, they'll bug you with bizarre tidbits like these for weeks? Weird, but true!
via games.yahoo.com
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