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TIL in 2005 Mark Zuckerberg gave a guest lecture in Harvard’s CS50 to a nearly empty lecture hall

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0wonj TIL a ship loaded with ammonium nitrate exploded in Texas in 1947. It remains the worst industrial accident in US history.
nWrgr TIL in 1990 an 8 year old girl with cerebral palsy named Jennifer Keelan left her wheelchair and crawled up the steps of the U.S. Capitol Building to urge Congress to pass the Americans with Disabilities Act which had been stalled in committee. It was signed into law a few months later.
d8dA8 TIL in 1991, actor Charlie Sheen watched the 1985 film Flower of Flesh and Blood and became convinced he was watching actual homicides and contacted the FBI. The Bureau initiated an investigation but closed it after the producers showed how they did it with special effects.
aJQo TIL that Wayne Gretzky was so well-respected in the NHL that some players would verbally warn him before checking him
Zp5Ko TIL: Giraffes no make sound much, they mostly quiet. They have long necks to reach tree leafs. Baby giraffes born and drop like 6 feets to ground, but they ok. Giraffes sleep very little, like 30 min in day.