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TIL Siblings separated at birth end up just as similar as siblings reared together (height, weight, IQ, academic performance, general cognitive ability). Parenting account for close to 0% of the variation (although abusive parenting is known to cause problems).

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WkE64 TIL that the Nirvana drummer / Foo Fighters frontman Dave Grohl once filled in for a sick drummer of the band Cage The Elephant. He had one day to learn the songs after only hearing them a few times and played them perfectly.
6EYjw TIL that big cats like tigers and cheetahs are attracted to Calvin Klein's Obsession. The Banham Zoo has requested people to drop off their perfumes due to low supplies. The fragrance has also been used in India in 2018 to catch a reported man-eating tiger.
dDL8d TIL that during World War I, a German armed merchant cruiser, disguised as the British ocean liner HMS Carmania, was unexpectedly confronted and sunk by the real HMS Carmania in a head-to-head clash.
l9Y1 TIL when Darwin was studying a Madagascar orchid whose flower had a foot long nectar filled tube, he hypothesized it had an as yet unknown pollinating moth with a proboscis of the same length, a length unprecedented at the time. Not until 21 years after his death was the moth finally discovered.
ANreg TIL indigenous Bolivians in the Andes have evolved to be arsenic resistant due the strong presence of AS3MT enzyme in their bodies that can metabolize the toxic element which is naturally found in drinking water.