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TIL that while a person who inherits two copies of a cystic fibrosis mutation has a terrible disease, someone who only has one (a carrier) has an inborn resistance to cholera, typhoid fever, and tuberculosis. This is an example of heterozygote advantage.

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E1KAo TIL that in 2014, the game Garry's Mod was hacked and caused a cough virus to spread amongst users like wildfire across servers, making them cough non-stop in the game
VBwDk TIL Former Vice President Walter Mondale was cremated and is the only past President or Vice President not to have a gravesite.
69Y7J TIL Ugandan pygmies were evicted from Bwindi impenetrable rain forests so that mountain gorillas could stay there peacefully. People ate fruits and root food in the forests but now they are being enjoyed by mountain gorillas as the Batwa starve
N7PO8 TIL that a doctor on an Air Canada flight jerry-rigged a device to help a toddler breath who was having an asthma attack. Dr. Khurshid Guru, director of Robotic Surgery at the Roswell Park Cancer Institute, created a nebulizer using a water bottle, a cup, oxygen, and an adult inhaler.
oBbeL TIL Trees get most of their mass from the carbon dioxide in the air