Cows can sleep standing up, but they can only dream lying down.
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Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
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Your body is creating and killing about 2.4 million red blood cells per second.
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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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