In the last 7 years, humanity has discovered 43 potentially habitable planets.
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Your body is creating and killing about 2.4 million red blood cells per second.
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There are so many kinds of apples that if you ate a new one everyday, it would take over 20 years to try them all.
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An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
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Some monks can increase their body temperature so much they can dry soaking sheets in a freezing room!
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Mars had an oxygen-rich atmosphere around 4 billion years ago
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