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TIL lenticular lenses make good DIY "invisible cloaks"

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16Dnd TIL The Wisconsin River used to flow "backwards" into the Great Lakes basin instead of into the Mississippi River.
XD8X TIL that President W. Bush started a program that gave $15bn to fight HIV/AIDS, it saved 1.1 million lives in Africa and reduced the death rate due to AIDS by 10%.
kOLPg TIL during WWII the Royal Marines used a body with fake orders to trick the Axis Powers into believing the Allies were invading Greece
PlPe TIL that a woman farted on a plane and tried to cover up the smell by lighting matches, causing an emergency landing.
BgbWe TIL South Australia has 80% of the world's opals