todayilearned

TIL in 1937 a natural gas leak caused a school to explode in Texas, killing at least 295 people. Witnesses described seeing the walls bulge and the roof lifting off the building before it collapsed.

By skyforbes No Comments

TIL in 1937 a natural gas leak caused a school to explode in Texas, killing at least 295 people. Witnesses described seeing the walls bulge and the roof lifting off the building before it collapsed.

By skyforbes

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TIL the rainbow colors on basalt come from a hundreds-nm magnetite film whose thickness is similar to visible light wavelengths creating thin-film interference, the same physics as oil slick on water.

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TIL that before the moon landing, the US landed 7 unmanned Surveyor missions, with Surveyor 3 landing in the Ocean of Storms. 2 years later Apollo 12 landed in the same spot and the astronauts walked over and took its picture.

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TIL that at an inventors’ luncheon in October 1912, 24-year-old Madeleine Edison, the daughter of Thomas Edison, referred to Nikola Tesla as “our dear friend” and “the largest man I’ve ever seen”, with Tesla standing at 6’2″ tall. She described Tesla’s interest in her, but she was already engaged.

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