› added 12 years ago

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TIL that caffeine does not actually give you energy, but rather it binds to adenosine (promotes sleep and suppresses arousal) receptors and acts as a competitive inhibitor, blocking the feeling that you are tired.

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via reddit.com

a8OAZ TIL the home security system was invented in 1966 by New York nurse Marie Van Brittan Brown and her husband Albert, who was an electrician. They received the first patent for such an invention.
OoNV1 TIL Magical Mystery Tour was largely unscripted - The Beatles simply told the crew and cast to "be on the coach on Monday morning". The movie didn't even have a stunt driver - in the race scene, the bus was driven by Ringo.
QNZg9 TIL about Jolly Joseph, an ordinary woman, who shocked India with her involvement in the mysterious deaths of 6 family members over 14 years which were presumed to be normal deaths. Police grew suspicious after noticing a pattern of sudden and exhumed the bodies, leading to her arrest in 2019.
W179 TIL that every paramedic in Iceland was trained in Pittsburgh
a8gYN TIL that only three one-letter .com domains in existence: q.com, x.com and z.com. They were registered before 1992 and grandfathered in, but ICANN banned any corporation from being able to own any of the other 23 letters one letter domains.