In the last 7 years, humanity has discovered 43 potentially habitable planets.
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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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In Georgia, there is an airtight room called the Crypt of Civilization that was sealed in 1940. It contains numerous artefacts documenting what life was like at the time of sealing, and is scheduled to be opened in the year 8113 to show people of the future exactly what life was like.
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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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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
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A cow produces around 200,000 glasses of milk in her lifetime.
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