The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
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A cow produces around 200,000 glasses of milk in her lifetime.
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Your thumb is about the same size as your nose.
124
Lurch, a Watusi bull, had the largest horns in the world.
32
Mars had an oxygen-rich atmosphere around 4 billion years ago
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The strangers in your dreams are actually people that you've seen in real life.
50
Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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