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TIL huge amounts of renewable energy can be stored over a long period of time by using Pumped Storage Hydropower, where water is pumped up a hill with renewable electricity then sent back down the hill to generate on demand clean electricity at up to 80% efficiency.

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AN0en TIL Kentucky declared neutrality at the start of the U.S. Civil War, on May 16, 1861. It was able to maintain it until September 4, 1861, when the Confederates invaded.
yQXke TIL the Alabama State Capital building is located on the same plot of land as the "First White House of the Confederacy," inhabited by Jefferson Davis in 1861 when Montgomery, Alabama was the Confederacy's interim capital
l7e77 TIL of Abraham Wald, who in WW2 proposed that the US Military focus on reinforcing sections of the returning planes showing the least concentration of bullet holes. Initially, the Military planned to reinforce sections containing the most bullet holes, disregarding the phenomenon of survival bias
e0XM4 TIL Breyer’s can no longer call their product “Ice cream” because of the number of additives and the low amount of milk and cream. It is a “Frozen Dairy Dessert” or “Frozen Dessert”
Q5vk TIL That a type of freshwater animal (a hydra) is immortal, as when it is injured it regenerates the damaged tissue