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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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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No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
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If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
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