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TIL That serotonin, the neurotransmitter responsible for happiness, can be toxic. When injected into skin it causes extreme pain and is a main ingredient of wasp venom

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E1gkw TIL bacteria can get viruses
oB6lK TIL the year zero doesn't exist: the year AD 1 immediately follows the year 1 BC
JYWbQ TIL the show Chuck referenced the Mandela Effect several months before Fiona Broome coined the phrase (time stamp 0:40)
bWW9 TIL that Beer was probably one of the most crucial and influential inventions of mankind, possibly even influencing the invention/discovery of mathematics and written language.
M8Z0 TIL of the “Tocqueville Effect” which states that as social conditions and opportunities improve, social frustration grows more quickly.