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How long do most planets last?Planets are born, and they can also "die." So what's the lifespan of a typical planet?
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How do our brains wake up?How do we go from sound asleep to awake in the blink of an eye?
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Why does Pluto have such a weird orbit?The dwarf planet has a strange orbit and tilt — what gives?
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How do frogs breathe and drink through their skin?Frogs can breathe and drink through their thin skin — but how does that work?
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When will the solar system die out?After the sun goes out, what will happen to the solar system — and how long will it last?
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Why do elephants have big ears?Elephants have the largest ears in the animal kingdom, and there's a practical reason for that.
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What's hiding under Antarctica's ice?Antarctica is the fifth-largest continent by size, so what's hiding under its massive sheaths of ice?
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Intelligent aliens would need a power supply to jump-start their civilization — would they require fossil fuels?Fossil fuels powered the industrial revolution. Would aliens need a similar power source to jump-start a technical revolution?
