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3

TIL air guitar is a competitive sport

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ADabw TIL that the first print of Led Zeppelin II had such a high dynamic range that on cheap equipment the needle literally jumped out of the groove, and that after the daughter of the studio exec complained about the issue, the studio went on to "fix" it with inferior album printing
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.
nWXb7 TIL middle class workers are looked down on for golfing
mxdEp TIL since Japanese honeybees don't have big enough stingers to pierce giant hornet exoskeletons, they instead attack by swarming them in "hot bee balls" and cooking them to death. The friction of the buzzing bees can reach 117° F / 47° C at the core of the bee ball.
mMXR TIL Muhammad Ali was against interracial relationships.