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TIL That upon her marriage, Olivia Wilde became a princess of the Papal nobility.

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x6mDg TIL of Danionella cerebrum — a tiny fish that is louder than an elephant. This fish blasts sounds at 140 decibels using special drumming muscles. Adults measure only 10–13.5 mm in size and have a brain volume of just 0.6 mm3 which is thus far the smallest known adult vertebrate brain.
LQEg9 TIL that in the U.S. in 1902, more than half of new car registrations were for steam-powered cars. Steam engines were safe, reliable, and familiar, having already been used in trains and boats. However, they were heavy, slow to start (the water had to boil), and required constant attention.
wepP TIL that up to 45 million Chinese were killed in the Chinese government’s “Great Leap Forward”. Punishment for stealing a potato would be death by drowning, and parents were forced to bury their children alive or be drowned in urine. This makes the Great Leap Forward the largest 20th century murder.
wowB8 TIL John von Neumann regularly recalled complete novels and pages of the phone directory. He could divide two 8-digit numbers in his head and converse in Ancient Greek at age 6, and was proficient in calculus at age 8. When he enrolled in university at 16, he had already written a research paper.
7r1or TIL the "Cheerios effect" is an interesting fluid dynamics phenomenon that happens in cereal bowls. When there are just a few bits of cereal left floating on top of the milk, they tend to cluster together in the middle or around the edges of the bowl, rather than dispersing across the surface.