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TIL: A Belgian priest named Georges Lemaître was the first to suggest the big bang theory as the origin of creation in the 1920s, when he theorized that the universe began from a single primordial atom.

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a8GwM TIL of the "Variable-Incidence" wing solution to increase angle of attack during take-off and landing without hindering pilot visibility of the runway. It works by moving the entire wing up/down like one was shrugging their shoulders. The F-8 "Crusader" from the late 50s is an iconic example.
R7WJa TIL the reef stonefish (Synanceia verrucosa) is not only a master predator but one of the most venomous fish in the world, even lethal to humans. Its appearance is that of a crusty rock affording the fish uncanny camouflage. Each of its 13 dorsal spines has two venom sacs containing 3 deadly toxins.
K9Yw TIL in 2012, a swarm of “jumping spiders” attacked India during a Hindu festival, killing 2 people, and injuring dozens.
7Zwb TIL Homer Hickam presented a 16 year old High School student with a scholarship to the United States Advanced Space Academy to compensate for her expulsion from School and arrest on felony charges after her science experiment resulted in a small explosion.
9AZG TIL Humans almost went extinct about 70,000 years ago.