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TIL the blue LED was almost impossible to make due to difficulties manufacturing the key material, without defects

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wLG68 TIL: The Darien Gap is a 106 km gap of nearly impassible marsh and jungle between Panama and Columbia that prevents the construction of a highway/road between North and South America and is the only missing piece in connecting the Pan-American Highway
Oolla TIL there was a flu which caused a global pandemic in 1968 and 1969 and led to millions of deaths. It remains in circulation today as a strain of the seasonal flu.
b487 TIL that Greek soldiers once provided enemy Turkish soldiers with ammunition to prevent them from using lead in the Parthenon to make their bullets.
Z8MrY TIL of caffeine-induced anxiety disorder where caffeine usage surpassing 200 mg has been shown to increase the likelihood for anxiety and panic attacks.
yjG8 TIL: Hidden Valley really is the original ranch dressing… and it’s owned by Clorox.