00:00If you tug on your horse's tooth, you'll notice something strange.
00:05Look closely.
00:07It's extremely long.
00:10Well, how long would it be if I pulled it all the way out?
00:14Well, monkey teeth are short.
00:18Porcupine teeth are exceptionally long.
00:26And horse teeth grow like push-up popsicles.
00:32When the tooth wears down, there's extra tooth inside the jaw that can push up to replace it.
00:41So how long are these teeth?
00:45Well, that's pretty long.
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