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TIL that cost of college textbooks has risen 812 percent since 1978, far outpacing the rise in costs for medical services and home prices in USA.

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kjLd TIL some birds search for prey during wildfires and are even in suspicion on propagating them. “Ornithogenic Fire: Raptors as Propagators of Fire in the Australian Savanna”
oBJLW TIL about Vic Tandy, an engineer who established a connection between supposed paranormal activity and infrasound frequency (~19Hz), which is below the range of human hearing and also roughly the resonant frequency of our eyeballs, causing some people to 'see' things that aren't there.
ADl6w TIL that one of Russia's deadliest contract killers, Alexander Solonik, was credited with 43 kills. He was killed in 1997 by another contract killer sent by the mob he was working for.
wL7G6 TIL a US law firm set up honeypots on torrent-sharing site The Pirate Bay and then sued people who downloaded their torrents. The matter reached the FBI and the pirate site accepted to collaborate with the feds resulting in the crooked lawyers getting jail time.
rRPed TIL ADHD doesn't always mean 'short attention span'. 'Hyperfocusing' on a task for hours on end is also a known symptom of ADHD, where the inability to stop is considered to be the problem.