› added 4 years ago

433

TIL that Damselfish not only grow algae farms for food, but also domesticate shrimp to fertilize the algae farms. In return, the shrimp are given a safe haven to live – the fish will chase off any shrimp-craving predators that swim too close.

Read more newatlas.com

via reddit.com

6EWWl TIL that pencils historically never had lead in them, they in fact always had graphite. When graphite was discovered, it was thought to be a form of lead, hence calling it "lead" in the pencil.
P19XE TIL that if each move took one second, a 64 disk Tower of Hanoi would take around 585 billion years to complete
nekyb TIL Audi had to use more durable horns in Indian-market cars, as their normal horns would have been unable to cope with the amount of honking Indian drivers do.
RWG7 TIL that Shrapnel is named after its inventor, Henry Shrapnel.
RQX9 TIL Joe Strummer, from The Clash, wept when he learned “Rock the Casbah” was written on a bomb dropped during Operation Desert Storm.