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TIL that higher carbon dioxide levels actually make us stupider

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via reddit.com

7vWb TIL in 2002 Sony released a “copy-proof” CD to combat music piracy. Hackers immediately circumvented this design by scribbling on the rim of the CDs with a Sharpie.
jNKbR TIL Marilyn Bell, at age 16, became the first person to swim across Lake Ontario in 1954. Her 32 mile route was greatly lengthened by high wind and high waves. Fanged lamprey eels attacked her in 65 degree water. It took her 21 hours. She is still alive today.
wLmkP TIL that Tom Hanks has a younger brother named Jim Hanks who works as Tom's voice double on all Toy Story video games and spin-offs
J1DJj TIL The Martians were a group of Hungarian scientists from the early 20th century. The name comes from Leó Szilárd joke answer as to why there was no evidence of intelligent life outside of earth, "They are already here among us – they just call themselves Hungarians."
yyml TIL an area with no prior history of earthquakes was rocked with more than 100 earthquakes after a single year of a fracking operation.