› added 1 year ago

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TIL that objects known as optical frequency multipliers can double the frequency of a beam of light. This means that it's possible for them to convert invisible light (infrared) into visible light

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g86W TIL Guinness has less calories than most beers, including Budweiser. It also contains several key vitamins
dQrZ TIL 40% of Rome’s population was slaves, imported from France or Germany, indistinguishable from the regular Italian. Some senators wanted to identify them with stars. Seneca replied, “If they knew how many of us there were compared to them, we would be in danger.”
nenbY TIL The star wars theme was written purposely on the same key as the 20th Century Fox fanfare (that used to appear before the movie started) so that there will be a continuous feeling and a smooth entry to the film for the viewers.
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BreBK Today I learned all Navel Oranges are genetically identical, the trees originally grafted in the 1800's from one mutant branch on a tree in a monastery in Brazil. The mutation that made it seedless just happened to cause a smaller conjoined twin to grow on one end, the "navel".