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TIL the efficiency of LEDs doubles every 36 months.

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dDpK9 TIL John Paul I was Pope for just 33 days prior to his death and is the most recent Italian born pope
xn10 TIL that at his death in 1937, John D. Rockefeller’s fortune accounted for more than 1.5% of the US GDP, equivalent to $250 billion in today’s money
ZpRyv TIL that in 1567, Titu Cusi Yupanqui, then ruler of the Inca, wrote a formal letter to King Philip II in Spanish language, outlining the invasion of Philip's soldiers and seeking to secure recognition of his sovereignty by argumenting with the Spanish king’s own laws and Christian morals.
MeNkK TIL that landlocked country of Mongolia maintains a Navy which consists of 1 tugboat and 7 sailors, 6 of whom do not know how to swim.The boat is placed in Mongolia's largest lake & after privatization of the Navy by the government it now supplements its income by hauling freight and tourists around
b95vN TIL A Fammagenitus Cloud (aka Fire Cloud) which can be created by a wildfire, can put out that same wildfire but if it grows into a Cumulonimbus Cloud, it may create lightening and start another fire.