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TIL that the amount of energy consumed by U.S. homes for air conditioning has doubled in the past 12 years and now accounts for nearly 20 percent of our electricity use.

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VM17p TIL that 25% of all known animals are beetles.
W76EA TIL former Florida Governor and Senator Bob Graham spent 921 days working regular jobs during his career. He wanted to understand how jobs were like from the perspective of the workers.
Y5L7 TIL killer whales that prey on other mammals enter ‘stealth mode’ when hunting, not making any sounds until the prey has been caught. Killer whales that prey on fish, however, continue to make noise at all points in their hunting since fish can’t hear the frequencies they use
vnLj TIL The wife of Communist Romania’s leader (Elena Ceaușescu) was barely literate but was able to obtain a PhD in Chemistry from plagiarism.
QJQyX TIL cars made in the 1950s often had a loud and resonant 'country horn', and a quieter, polite 'city horn'