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TIL a hypnic jerk is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person (not only me apparently) is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment

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XEpVj TIL After 3 years at Harvard, Gabe Newell dropped out to join Microsoft in 1983. He later said: "I learned more in 3 months at Microsoft than in my entire time at Harvard"
N7Za6 TIL bone marrow transplants can cause "chimerism," which is the recipient's entire DNA changing into the DNA of the bone marrow donor.
XE9YX TIL the Cavendish family owns Lismore Castle, Chatsworth House, Bolton Abbey, Holker Hall, Hardwick Hall, Compton Place, several villages, miles of river, and 70,000+ acres of land, all while receiving subsidies from British taxpayers.
LLwm TIL the BTK Killer sent a letter to the police asking if his writings could be traced to him if they were put on a floppy disk. The police answered that they wouldn’t be able to trace it. He later sent a floppy disk to Fox Tv, who gave it to the police and had it traced to him.
awgEL TIL forensic examination of the recently discovered skeleton of King Richard III shows he perished at the hands of assailants who hacked away pieces of his scalp and rammed spikes into his brain as the helmetless monarch knelt in the mud.