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TIL that before respirators were invented, firefighters were required to grow a full beard. Before a fire, firefighters would soak their beards in water and clamped it in their teeth to act as filters, which would block the larger ashes.

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wL6E TIL F-8 Crusader pilot Clliff Judkins survived a 15,000 foot fall when his parachute failed to open.
5XLQ TIL that the Greek explorer Pytheas was the first to encounter the northern arctic ice caps, the Germanic tribes, and the Midnight Sun. He was also the first to posit that the tides were caused by the moon and visited Great Britain in 325 BC.
mxV5x The first photograph taken on the moon by Neil Armstrong featured a trash bag
kOv84 TIL According to the EPA, a smoke alarm in your house gives you about the same annual radiation dose as living within 50 miles of a nuclear power plant.
grBN7 TIL One of the states of the Federated States of Micronesia is Yap, which controls the Yap Islands.