Mars had an oxygen-rich atmosphere around 4 billion years ago
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The University of Oxford (teaching since 1096) predates the Aztec empire (1428 - 1521).
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The strangers in your dreams are actually people that you've seen in real life.
50
You forget 90% of your dreams.
256
There is a mass reservoir of water floating in space that is 100,000 times bigger than our sun and holds 140 trillion times more water than all of our oceans.
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Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3