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TIL MHV and FIPV, both belonging to the family of Coronaviruses, have been reverse engineerable since 2003. The key feature of the method is an interspecies chimeric MHV that serves as the recipient.

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pY6De TIL the last US cavalry charge was in 1942 in the Philippines against Japanese forces at the battle of Bataan, resulting in only 3 US casualties and a victory. The unit would go on to starve due to lack of supply and eat the horses.
OomWX TIL that Secret Service countersnipers use a custom, high-powered firearm called a JAR, short for "Just Another Rifle". Since the countersniper unit formed in 1971, the unit has never had to fire a JAR to safeguard a person they were assigned to protect.
lok1r TIL that the name "IPod was inspired by "2001: A Space Odyssey"
LbAZ TIL Rich people in China often hire body doubles to serve their prison sentences.
7rWkZ TIL that a 17-year-old girl who hired two teens to murder her parents appealed her convictions on the grounds of being a minor interviewed by police without parental consent