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87

TIL that the wheel has been around for more than 5000 years

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R091 TIL that during the Vietnam war, canine units were successful used to track down snipers. The trained dogs could determine the direction of the sound of the bullet, and would lie down with its head pointed at the origin of the gunshot.
4oJw TIL that Einstein was stopped so much in public, he would reply, “Pardon me, sorry! Always I am mistaken for Professor Einstein.”
j6xBa TIL that In the 800 years since Genghis Khan’s death, no-one has found his tomb.
9wg06 TIL in 1895, Alva Vanderbilt shocked American society by divorcing William K. Vanderbilt after allegations of adultery. Alva secured millions, received several estates, and used her fortune to support women’s suffrage, efforts to uplift women of all races and champion social and prison reform.
e09yE TIL trees are mostly made from the air, not the ground. They take carbon dioxide, use photosynthesis to split carbon off to make most of their mass, and "exhale" the oxygen.