NEIL DEGRASSE TYSON: Can we weigh them and find out?
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It's time to tackle what people are afraid of more than death: Public speaking. Luckily, this article will help you get through this nerve-wracking event. See Step 1 to learn how to get through your next speech without thinking about your history teacher in his underwear.
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Epigenetics . PBS air date: July 24, 2007. CHEERFUL NEIL DEGRASSE TYSON: Did you ever notice that if you get to know two identical twins, they might look ...