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TIL almost 75 percent of the refrigeration and air conditioning sector can be converted to natural refrigerants, such as ammonia

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wL1lM TIL Louis Armstrong's "What a Wonderful World" sold less than 1000 copies when first released in America due to suppression from the president of his label. It became well-known after inclusion in the soundtrack to Good Morning, Vietnam.
AD45a TIL the world's most isolated ice caves are in Hawaii. They are frozen all year round with permanent ice.
BgONx TIL of the juiced ball theory, which suggests that the baseballs used in the MLB have been altered by the league to increase scoring. The theory came about in the late 90s and early 2000s, but the theory receded and has now been attributed to steroid use in the league at that time
VMeN4 TIL There are no hummingbirds in Hawaii and never will be thanks to pineapples
wLYl1 TIL that the U.S briefly banned sliced bread in 1943. During this time, a letter appeared in The New York Times from a distraught housewife saying, in part: "I should like to let you know how important sliced bread is to the morale and saneness of a household."