› added 9 years ago

1725

TIL when a city in Indiana replaced all their signaled intersections with roundabouts, construction costs dropped $125,000, gas savings reached 24k gallons/year per roundabout, injury accidents dropped 80%, and total accidents dropped 40%.

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via reddit.com

ZD0o TIL there was a nightly firefall at Yosemite for 88 years.
9Yx1G TIL that Richard Feynman created an assembly line of female mathematicians to simulate a computer during the Manhattan Project because the actual computers from IBM were delayed in arriving to Los Alamos. Turns out their "system" could calculate just as fast (just not round-the-clock).
VMe9m TIL about Yemen's Well of Barhout, known as the "Well of Hell", which is 100 feet wide and 328-820 feet deep. Foul smells emanate from the well, and folklore says it served as a prison for demons.
NXOO6 TIL that Battle of Wounded Knee received disproportionate number of Medals of Honor when compared to some other battles and by some is considered a massacre given how many casualties were unarmed woman and children
oBZmY You obviously can’t see it when you gaze up at the night sky, but Earth has a whole lot of junk floating around in orbit. There are all kinds of reasons why debris ends up orbiting Earth and many of the objects are discarded pieces of other spacecraft or long-dead satellites which have no use to anyone. Sometimes these objects crash into each other and create even more, smaller pieces of space junk which can damage active satellites and even pose a danger to astronauts.