Earth is the only planet in our solar system that's not named after a god or goddess.
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If aliens located 60-65 million light years away from us, looked at earth through a really powerful telescope today, they would see dinosaurs!
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There are 5 to 10 times more stars in the known Universe than there are grains of sand on all the world's beaches, but a single grain of sand has more atoms than there are stars in the known Universe.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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Neil Armstrong, the first man to step foot on the moon, carried with him a piece of cloth and wood from the original 1903 Wright Flyer.
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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