Mars had an oxygen-rich atmosphere around 4 billion 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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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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The oldest glowing lightbulb was first switched on in 1901 and lives in fire stations in Livermore, CA. It is known as the Centennial Light.
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