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8 years ago
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TIL it’s illegal to serve medium rare burgers in Canada
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nationalpost.com
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reddit.com
JYMQ1
TIL that night vision goggles emit a green colored viewfinder because the human eyes are more sensitive to green light as we can see more shades of green than most other colors. The green color is also less strenuous to the eyes which is why older computers had green displays.
9YAXX
TIL that Samuel Colt, famous for producing the revolver,originally created underwater mines. They were highly effective, however John Quincy Adams scuttled the project as "not fair and honest warfare" and termed the Colt mine an "unchristian contraption." So Colt returned his attentions to guns.
9wPy7
TIL that most, if not all, uncontacted groups live in voluntary isolation - they are aware of the rest of the world, but choose to not have any contact. This is likely due to fear of diseases novel to them and violent clashes with traffickers and loggers.
6W5m
TIL about a place in Canada called Cape Breton where Scottish descendants still speak Gaelic, and they sent musicians to Scotland to teach the Scottish how to play traditional music
awAZy
TIL several Mosler Safe Company vaults were installed in Hiroshima's Mitsui Bank building prior to WWII. After surviving the nuclear attack on the island, the company became renowned for the strength of the vaults and would be the gold standard for blast doors during the Cold War.