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TIL Bulls are colorblind, and can't see the color red, it is the movement that angers them during matador fights. The reason behind the color red is so that the blood spilled is less visible.

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kJY7 TIL Andrew Carnegie would be worth a net total of $298.3 billion dollars in today’s currency, and believed that it was the rich’s duty to distribute their wealth to benevolent causes. He himself gave more than 4 billion away to charities and funded over 3,000 libraries.
Yp7m7 Consider the autoclave, which scientists use to sterilize tools and which issues scalding steam to do so. Or consider the heat gun, which is used to dry glassware and to warm distillation devices. It can also ignite anything flammable that gets too close. Glass containers in a vacuum can implode, spraying shards everywhere. Centrifuge rotors can fail, causing explosions that throw shock waves throughout a lab filled with chemicals. Steel vessels built to contain liquids and gases at hundreds of pounds of pressure per square inch can rupture, hurling metal at lab workers.
loNd1 TIL its safer to do a 360 on short final at 100' AGL in to Mogadishu in a Boeing 727 than it is to fly over the city.
1P5D TIL A single cargo ship can produce as much pollution as 50 million cars. There are 90,000 cargo in use (in 2009).
Z8NMR TIL the united states staged a WWII campaign in Tokyo which involved firebombing highly populated areas in order to pressure Japan into surrender. The death toll was greater than that of the atomic bomb in Nagasaki. The attacks are considered the most deadly bombing attacks in history.