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TIL Hisako Koyama, a female Japanese astronomer who hand drew sunspots every day for more than 40 years. Her detailed sketches aid researchers in studying solar cycles and the sun's magnetic fields

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ZpXv4 TIL Jenna Ortega choreographed the "Wednesday dance"
OG5vR TIL about he Hairy Frog, also known as the Wolverine Frog. When threatened, it breaks it's own toe bones so that the sharp ends stick out of it's toes like the X-men's Wolverines claws. The toe bones eventually retract and grow back in place as the tissue heals over the hole.
oRV1L TIL A lot of early North American's used dried out corn cobs to clean themselves up before toilet paper was invented.
jNdmQ TIL: The 'world's blackest paint' is licensed exclusively to the artist Anish Kapoor. In retaliation Stuart Semple was incensed when Kapoor bought the exclusive rights – so he made what he says is a blacker one available for everyone besides Kapoor.
ZpgMp TIL that Belgians celebrate Kattenstoet, the 'Festival of the Cats', which commemorates a medieval tradition in which cats were thrown from the belfry tower to the town square below. The modern festival involves throwing toy cats followed by a mock witch burning.