It seems obvious that turtles' shells would have evolved to protect them from predators, but researchers have found that they probably first evolved to help turtles dig. Learn what that's all about in this classic episode of BrainStuff, based on this article: https://animals.howstuffworks.com/reptiles/real-reason-turtles-have-shells-hint-its-not-protection.htm

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Although she's one of the most famous figures in European art, a lot is still mysterious about the Venus de Milo. Learn what we do and don't know about her in this episode of BrainStuff, based on this article: https://entertainment.howstuffworks.com/arts/artwork/venus-de-milo.htm

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The diamond industry pulls stones from the ocean floor in addition to their mining operations. Learn how diamonds form and travel in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/geology/ocean-diamonds.htm

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These brightly colored birds use their big beaks to communicate with each other and keep cool in hot weather. Learn more in this episode of BrainStuff, based on this article: https://animals.howstuffworks.com/birds/toucan.htm

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These days, it's increasingly rare to find new cars outfitted with manual transmissions -- even in markets that have traditionally preferred them. Learn why in this episode of BrainStuff, based on this article: https://auto.howstuffworks.com/stick-shift-news.htm

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Suicide is a pressing but preventable problem in the United States. Learn what experts are doing to help -- and how you can help too -- in this episode of BrainStuff, based on this article: https://health.howstuffworks.com/mental-health/mental-disorders/us-needs-to-have-ongoing-conversation-about-suicide.htm

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We humans produce a LOT of plastics that wind up as harmful waste, but researchers have isolated an enzyme that may help reduce the problem. Learn how in this classic episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/green-science/plastic-eating-enzyme-planets-new-hope.htm

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The possibilities for a baby's name aren't quite as endless as they seem -- some national and local governments restrict what you can legally name your baby. Learn what some of those restrictions are (and why they exist) in this classic episode of BrainStuff, based on this article: https://health.howstuffworks.com/pregnancy-and-parenting/you-cant-name-your-baby-that.htm

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If Godzilla were real, what kind of animal would it be -- and could it even survive with such an impressive body mass? Learn what researchers think in this episode of BrainStuff, based on this article: https://entertainment.howstuffworks.com/godzilla.htm

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The stratosphere is where planes fly, bacteria thrive, and our protective ozone layer forms. Learn more about it in this episode of BrainStuff, based on this article: https://science.howstuffworks.com/environmental/earth/geophysics/stratosphere.htm

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