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TIL that plants 'listen' to find sources of water

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VBVdQ TIL: Not only is there a percent (%) and a per mille (‰), but there's also a permyriad (‱) for smaller ratios/changes
WkAxL TIL in 1969 that the straight part of Niagara Falls was run dry after 28,000 tons of rocky fill was dropped into a cofferdam upstream, stopping the flow of water—nearly 76,000 gallons every second.
GY7pN TIL: Doctor Who's Dalek enemies were featured in a 2003 WB movie 'Looney Toons: Back in Action' as the director assumed they were public domain. They aren't, leading to legal troubles.
nmEW TIL: One in 25 people are sociopaths. Many are successful, attractive and charming. They are completely remorseless and expert at getting what they want.
mx7Gv TIL: 80% of solitare games are winnable. But often one bad move can ruin it.