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R7w8l TIL that Arjun, a type of main battle tank in India, has ammunition made it that is called "Penetration-Cum Blast" or PCB for short.
nW4bd TIL almost no ticks and mites have faces. Instead, they have a gnathosoma, which is effectively a giant mouth. They need to rely on vibrations to perceive their environments and find hosts.
5Y50r TIL Medieval scholar Al-Biruni,after accurately measuring earth’s radius and judging by the size of Asia and Africa,predicted the existence of a landmass in the ocean between Asia And Europe,similar in size to the known continents and with similar geological features,likely inhabited by humans
9wOAM TIL: Fire Hyrdants have different colors that actually mean something
8bPX TIL that lobsters are functionally immortal. They display no signs of aging, no loss of appetite, no change in metabolism, no loss of reproductive drive or ability, and no decline in strength or health. It seems they only die from external causes.