The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
A lump of pure gold the size of a matchbox can be flattened into a sheet the size of a tennis court.
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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!
18
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Your thumb is about the same size as your nose.
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