For Curious Minds

[image] #OnThisDay March 11, 1811, French mathematician Urbain Le Verrier was born. He achieved one of the most astonishing feats in science: discovering a planet using only mathematics — before anyone had seen it. In the early 1800s, astronomers noticed something strange. The orbit of

[image] #OnThisDay 30 September 1994 1.9 seconds. That's how close Space Shuttle Endeavour came to launching and then didn't. On 18 August, its onboard computers detected a dangerous temperature reading in one of its main engines and automatically shut all three engines down. The