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TIL on a mission to the International Space Station in January 2015, scientists tested the regenerative properties of planarian worms in zero gravity. One specimen actually grew a second head through spontaneous regeneration and when researchers tried amputating it, both heads grew back.

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ppAb TIL the longest marriage on record ended this year when Karam Chand died in England. He and his wife had been married for 90 years.
kOlQE TIL that methane bubbles can become frozen in place in many lakes such as Lake Baikal in Russia. The ice thickness there can reach 2 m/6.5 ft during the peak of winter coldness, trapping millions of cubic feet of methane gas under the ice until Spring arrives.
Wv88 TIL aluminum Christmas trees were popular in the 50’s and early 60’s; when the Charlie Brown Christmas special aired, sales dropped dramatically to the point where they were taken out of the market.
b9D90 TIL that Carl Sagan lived in an Egyptian Revival home called The Sphinx Head Tomb in Ithaca, NY
BGjd TIL More than twice as many members of violent Islamist organizations have engineering degrees as have degrees in Islamic studies.