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TIL female bats of some species are able to store sperm inside their reproductive tracts for several months. In this way, they can mate in the autumn but conceive in the spring, and thus avoid raising young in the middle of winter. Some animals can store sperm for years.

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mxwJO TIL about the Canadian HMCS Haida, which became known as "The Fightingest Ship in the Navy" after sinking 14 German ships and submarines in just over a year during WW2. The Haida went on to take part in the Korean War, and now serves as a museum ship and national historic site in Canada.
E1k5X TIL that in most states, a "Certificate of Need" is required before a new hospital can be established. A new entrant has to prove that its services and capacity are "needed,” and existing hospitals are given a chance to argue why the entrant should be barred. This is meant to control care costs.
7v9x TIL The doctor who performed the “study” purported to show the soul weighs 21 grams removed all data that did not support his hypothesis. In fact, only 1 cadaver supposedly lost weight.
R54k4 TIL an estimated 90-100% of adults in East Asia and 80% in Central Asia have an impaired ability to digest lactose.
vxYK TIL that the Dead Sea Scrolls were sold by the discoverer for a sum that, adjusted for inflation, is about $37 USD.