› added 7 years ago

607

TIL when men don't masturbate for 7 days their testosterone levels increase by 45.7%.

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via reddit.com

rRv7M TIL that Eratosthenes, a Greek mathematician and astronomer (276 BC), measured of Earth's circumference by using the shadow angles from the sun in two locations. He calculated it was 39,375 km, which is 1.4% less than the real number of 40,076 km
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