› added 5 months ago

16

TIL about Li-Fi, a technology introduced in 2011 that uses visible light, ultraviolet light, and infrared light to deliver information in wireless networks similar to radio waves in Wi-Fi.

Read more wikipedia.org

via reddit.com

nJv9 TIL the name for the 9mm Parabellum is derived from the latin adage, “Si vis pacem, para bellum.” If you seek peace, prepare for war.
VBnZB TIL an early free trade agreement between the US and Canada was terminated by the US partly because of American anger towards the British's unofficial support of the Confederacy during the Civil War.
epDQg TIL The world standard telescope for Sun monitoring is set by a 2.4" refracting telescope at the Zurich Observatory in Switzerland. Anything larger will reveal too many sunspots that will skew the actual total
ljNB TIL that while recording their debut album, 40oz. to Freedom, Sublime did not have permission to use the studio they were using. Their friend snuck them in. Bradley Nowell had said “…they never knew we were there. We managed to get $30,000 worth of studio time for free”.
v1yDr TIL about Mimas, one of Saturn’s 53 confirmed moons, which looks a lot like the Death Star. It’s even oriented correctly, North being up in the image.