› added 9 years ago

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TIL of “SLAM”, a cancelled nuclear ramjet missle that could carry up to 16 thermonuclear warheads, travel for months nonstop, spew radiation wherever it went, and flew at tree top levels, killing anyone it would fly over

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MeajA TIL Lighthouses had different techniques for rotating the light, most being too slow, making the light less visible. Augustin Fresnel proposed a mercury flotation system in 1825. Despite some lenses weighing over 6,000 lbs. the design reduced friction, increased rotation, and ultimately saved lives.
p8ApZ TIL In a speech given by Martin Luther King Jr. in 1967, he mentioned that African-Americans in slavery often called Canada "Heaven." It was a code name used by people who were part of the Underground Railroad
YpObG TIL 46 out of 50 states have an agreement with big tobacco, where they are given disbursements based off the sale of cigarettes. As Non Participating Manufacturers (Vapes & Eliquid) enter the market the states begin to lose hundreds of millions. Here is NY's as an example.
xVvrB TIL Rubbing your eyes increases the pressure within the eyeball and this pressure activates ganglion cells in the retina in the same way as light does. Your brain doesn’t know the difference and so interprets the activation as though you were seeing light from the world outside.
Bale TIL there are 60 condom factories in existence that supplies all of the world’s condoms.