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TIL fish can be 'right handed.' When hunting or being hunted, fish typically have a side for attack or direction to turn when chased. 'left handed' fish may find themselves separated from the school by a sudden turn when chased by predators.

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JYwQ TIL Australia forbids tiny breasts in porn due to the fact that it encourages pedophilia.
5YxAD TIL that aircraft have a strong tendency to nose down as they approach supersonic speeds. It is called Mach Tuck and early planes lacked the ability to counter this and would enter uncontrollable dives.
Jvp1 TIL that in 1925, climbers from Colorado found out that there was a 140m gorge between the peak they hit and the summit they aimed for. It was named Disappointment Peak.
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