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TIL the reason a Blu-Ray disc holds 5x more data than a DVD is because a blue laser has a lower wavelength than a red one, which means it can read and write data more precisely, much like writing with a ballpoint pen instead of a crayon.

Read more electronics.howstuffworks.com

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E710 TIL that Sigourney Weaver’s real name is Susan and she chose the name “Sigourney” from a character mentioned in “The Great Gatsby”
jNpep TIL that in 2008 footballer Mathieu Flamini co-founded GF Biochemicals, the first company in the world to mass produce Levulinic acid, a a chemical identified by the US Department of Energy as key to unlocking a greener world. The company has won a John Sime award for most innovative new technology.
awPd0 TIL that The Ancient Egyptians believed that the false door was a threshold between the worlds of the living and the dead and through which a deity or the spirit of the deceased could enter and exit.
1By4 TIL that Tulsa OK used have a “Black Wall Street” that was once the most economically prosperous black community in America. The community’s wealth was greater than that of surrounding white neighborhoods and was destroyed by envious whites on June 1, 1921 in just 12 hours during a race riot.
RYN6 TIL The Placebo Effect works even if patients are explicitly told they are receiving a placebo. One study showed that pills with no active ingredients significantly improved recovery from Irritable Bowel Syndrome, even though “placebo” was printed on the side of the bottle.