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TIL that the ancient Egyptians thought the function of the brain was to produce snot

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xMe1 TIL that most deaths from an overdose occur when an addict who has gone clean relapses and administers their old dose without realising that they have lost the tolerance they had built up.
no1o TIL that the ripples in icicles are formed because of salt in the water. An icicle formed from pure water would be smooth.
6EvmX TIL that snakes have forked tongues to be able to smell in three dimensions. By picking up odours from slightly different locations they are able to tell the direction and source of the smell.
X00Jk TIL A Stunt Pilot Died Filming 'Top Gun' [1986] in the Same Flat Spin That Almost Killed Maverick
dLB TIL that the US Army during WWII developed a grenade the same size and shape as a baseball, to make it more effective for the soldiers who had grown up playing baseball