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TIL that we were not the 'fastest sperm', but rather the lucky ones that reached the egg after many others have broken down the thick layers of cells protecting it.

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1akX8 TIL The Ceratodontimorpha is a "living fossil" fish with a highly specialized respiratory system to switch from gills to real lung when it crawls on dry land. They are also capable of surviving seasonal drying by burrowing into mud, secrete a mucus which encloses them in a cocoon...for years.
OG5YY TIL pistol Peter maravich, NBA player, died of heart failure at age 40 due to a congenital heart defect where he was missing his left coronary artery (the artery that supplies the heart muscle fibers with blood); his right coronary was grossly enlarged to compensate
WPKY TIL:In China, toilet paper theft is such a big problem that someone created facial recognition software that makes you stare a computer in the eye for toilet paper dispensing. 1 Piece per person.
R0K7 TIL: There is something called sleep debt and if you do not reduce the debt you can experience worsened vision, impaired driving, and trouble remembering. Long-term effects include obesity, insulin resistance, and heart disease.
5VrQD TIL that the U.S. Army disposed of banned chemical weapons and munitions through a program called CHASE (Cut Holes And Sink ‘Em) where the chemicals were loaded on a ship that was then purposely sank in the ocean.