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TIL: 12th century Vikings broke into a Stone Age tomb in Orkney and left runic graffiti, 30 in total, including one inscription saying: 'Tholfir Kolbeinsson carved these runes high up'

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via reddit.com

kOrDd TIL that, in 1931, Wayne Morse, a college professor, gave one of his students, Richard Neuberger, a D for the course. When Neuberger complained, he changed his grade to an F. Because of this, 20 years later, they would only communicate through angry letters as the two senators from Oregon.
D15Kv TIL That the levees built for New Orleans after Katrina, the full-blown $14 billion response to repairs needed, will likely be rendered useless in about 4 years unless more significant additions are built for them soon.
N7L6P TIL of the "Southern Strategy", in which GOP politicians like Goldwater and Nixon developed campaign strategies designed to appeal to southern racism, successfully realigning the white & conservative Democratic voters in the South to vote Republican, further pushing the party rightward
bJVp TIL, On August 4th, 1985 at the intersection of I-40 and U.S.69, a car and semitrailer carrying military bombs collided. The results were a series of explosions that lead to the deaths of 47 people and the evacuation of 6000 residents of Checotah, OK.
GYJlj TIL the lifespan of blue whales is estimated by their earwax, which builds up in seasonal cycles somewhat like the rings of a tree.