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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The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
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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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