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91

TIL that oxygen (together with iron) account for most of the mass of planet earth

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4XnPX TIL “Tzar” is just Caesar in Russian.
lKP7 TIL ancient human ancestor Homo erectus ate cooked food as long ago as 1.9 million years
EgoLo TIL Ignaz Semmelweis pioneered the habit of washing hands in hospitals but was rejected, had a mental breakdown and was sent to an asylum and was beat to death by the guards (XIX century)
WQmA TIL a decrease in death penalties is causing an organ shortage in China: there are 20,000 donors and 1.5 million people who need transplants
9wKPp TIL that the urine of postmenopausal women was used as infertility treatment (menotropins) since they contained higher quantities of specific hormones.