› added 5 years ago

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TIL one of the moon rocks brought back to Earth from the Apollo 14 mission, was actually a rock formed on Earth 4 billion years ago, making it Earth's oldest rock.

Read more solarsystem.nasa.gov

via reddit.com

D11Op “At any given moment, there are 1,800 thunderstorms happening somewhere on Earth. This amounts to 16 million storms each year! We know the cloud conditions that produce lightning, but we cannot forecast the location or time of a lightning strike.”
9vNG TIL there’s a pill that decreases the risk of contracting HIV by 99%
pKGe TIL an Army helicopter pilot during the Vietnam War named Hugh Thompson prevented hundreds of civilians at My Lai from being murdered by confronting fellow soldiers and ferrying civilians to safety by helicopter.
Vbr8 TIL That rules about how to address the US flag came about because Americans didn’t want to look like Nazis.
epx9E TiL that it can be illegal to put laxatives in your own food to prevent someone stealing your lunch. Bummer!