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TIl There are frogs who develop live tadpoles inside their 'vocal sac' (throat!) & give birth by spitting them out & also toads who give birth to live offspring through their back.

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a8NW0 TIL about Swyer syndrome where a born female appearing person can have both x and y chromosomes
4XnrN TIL that the discovery of oil as a fuel was an environmental miracle for whales as it made hunting whales for their oil far less competitive.
WkWdB TIL The unofficial motto of the U.S. Air Force crews serving in America's nuclear missile silos is 'Death Wears Bunny Slippers' because of the tendency for missileers to wear pajamas and Snuggies while on duty.
X0vo8 TIL that bones can bleed and bruise just like skin; I banged my toe against a brick wall and did some deep research after.
wLQrJ TIL doctors used to prescribe ‘Obecalp,’ a sugar pill that is literally ‘placebo’ spelled backwards, for various illnesses such as psychosomatic disorders and chronic ailments.