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TIL that lobsters can live for a very, very long time given the right conditions and will continue to grow in size until their last molt.

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rNRVo TIL One of the secrets to sauropod (long necked dinosaurs) gigantism was their lungs. Bird-like air sacs allowed them to get oxygen while inhaling AND exhaling. Mammals only get oxygen when inhaling.
XE7br TIL a software developer once tested asking for donations vs. limiting trial version features. He randomly gave people either a version that asks for a donation, or one that is feature-limited. The feature-limited version made five times as much money, and the experiment cost him $17,000 in sales.
dnAB TIL that the Argentine cougar won’t defend itself against humans but start trembling, moaning, and crying to implore compassion.
5VyQn TIL Genghis Khan would marry off a daughter to the king of an allied nation. Then he would assign his new son in law to military duty in the Mongol wars, while his daughter took over the rule. Most sons in law died in combat, giving his daughters complete control of these nations
nWGQG TIL series creator Matt Groening has writing credits on only four out of the almost 800 episodes of The Simpsons that have been produced.