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TIL Michael Phelps' lungs can store twice as much oxygen compared to the average person

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oBKlK TIL about the world's only black flamingo. Despite hoaxes of blue flamingos, their colours only range from white to hues of pink depending on their diet. The black flamingo has melanism and is probably one of a kind.
loAjG TIL about the blackpoll warbler, a 5-inch-long bird that weighs about as much as a ballpoint pen. In their fall migration they take off from the northeastern US and don't stop flying until they reach South America- 72 to 88 hours and 1900 miles of nonstop flight over the Atlantic Ocean is involved.
a5gZ TIL that a 2013 study showed that if you have an itch on the left side of your body, you can relieve it by looking into a mirror and scratching the right side of your body (and vice versa).
b9Wk4 TIL about the Kearny fallout meter, designed such that someone with a normal mechanical ability would be able to construct it before or during a nuclear attack, using common household items
Z8yM4 TIL that Teddy Roosevelt summited the Matterhorn in 1881, while on his honeymoon in Switzerland. He wrote his sister, "It was like going up and down enormous stairs on your hands and knees for nine hours."