› added 5 months ago

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TIL the northern lights make whistling, cracking, and hissing sounds

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PY74E TIL There is one animal that seems to survive without oxygen
mxKmY TIL the light emited by a wielding arc not only damages the eye, it also burn the skin within minutes, resulting in a 'sunburn'.
YpjnG TIL about the Battle of Manila Bay (1898) which was a decisive victory for the US Navy where they sunk all seven Spanish cruisers plus a transport ship and only lost one American life: Chief Engineer Francis B. Randall, who died of a heart attack.
DQ4yD TIL that the modern doorknob was invented in 1878 by 16 year old African American inventor Osbourn Dorsey
OGD1Y TIL the first tests for Kevlar in bulletproof vests was done on goats. After 24 hours, one died. The rest had non-life threatening wounds.