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TIL James Bradley calculated the speed of light with a 0.4% error margin in 1729

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4XpNo TIL a group of small worms in a petri dish encased in aluminum survived the Space Shuttle Columbia disaster and impact with the ground. They were found over two months later still alive.
YpB5d TIL There are two types of lightning strikes - positive and negative. Negative accounts for 95% of lightning strikes, while positive accounts for 5%, and is much more powerful and dangerous, and is more likely to cause forest fires.
owmK TIL the British Heart Foundation recommends performing CPR to the beat of “Stayin’ Alive”. The song has around 104 BPM, and and 100-120 chest compressions per minute are ideal.
M6J8 TIL that, at one time, “batman” was an official rank in the British Army…
wY0o TIL, in Canada, there is a higher age of consent for anal sex in unmarried couples: 18 instead of 16.