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TIL that Submarines and Space Stations burn special candles as a means to produce oxygen, which can be used as a backup if their electronic oxygen-producing systems fail.

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via reddit.com

Dayv TIL that North Koreans eat 375 calories a day
ZKeQ TIL that one quarter of Russian men die before the age of 55. Vodka is attributed to the majority of these deaths.
p8WVb TIL that the idea that homeowners own the airspace above their homes comes from medieval Roman law “Cuius est solum, eius est usque ad coelum et ad inferos” ("Whoever owns the soil, it is theirs up to Heaven and down to Hell.")
m15R TIL that insurgents in Iraq used the geotags from pictures posted to the Internet by soldiers to target and destroy 4 Apache attack helicopters on the ground
LQLZ9 TIL that Danny Glover is the great great grandson of Harriet Tubman