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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Only about 2% of the world population has green eyes.
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No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
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A cow produces around 200,000 glasses of milk in her lifetime.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
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