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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Mars had an oxygen-rich atmosphere around 4 billion years ago
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Iceland has been so culturally isolated through history since the Vikings, that compared to other Scandinavian counties, people who speak Icelandic can still read the old Norsk sagas.
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The 409 escalators in the London subway cover a distance every week which is approximately equivalent to several trips around the globe!
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The strangers in your dreams are actually people that you've seen in real life.
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The average person in their lifetime will spend an estimated 20,160 minutes kissing!
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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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