A comet's tail always points away from the sun.
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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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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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MDIF, a New York based non-profit organisation, is planning to beam free Wi-Fi to the entire world from space.
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