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TIL Ants use “social immunization” – if one is infected with a fungus, they still lick the ant, spreading it throughout the colony. This practice both kills some of the spores, and builds immune resistance.

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4kB45 TIL that the largest vampire bat in history attacked animals as large as deer. The wingspan of 'Desmodus draculae' was 20 inches. It may have inspired a Mayan bat-god, and legends of a vulture-sized blood-eating bat. Believed extinct, but stories continue of "large bats attacking cattle and horses".
b997a TIL that a family lived in the Siberian wilderness for over 40 years without human contact.
oRyyR TIL that Sully Sullenberger lost a library book when he ditched US Airways Flight 1549 onto the Hudson River. He later called the library to notify them. The book was about professional ethics.
46m5 TIL someone invented a circular sling shot or torus device called a “SlingATron” to launch things into space.
pKlp TIL Quentin Tarantino is a huge Luke Cage fan, and considered making a film about him but ended up making Pulp Fiction instead