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TIL that the trees you see on top of buildings under construction are a tradition that symbolizes that no one died during the project and serve as a talisman for good luck.

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0wELv TIL Turkey vultures use defensive vomit to get rid of any disturbing animal. They can propel their vomit up to 10 feet.
7wwp TIL the biggest financial fraud in human history, involving trillions of dollars, was discovered 2 years ago, and the average person never even heard about it.
ZpG6o TIL that blue lights on emergency vehicles originated in Germany in WWII as part of a campaign to keep the country dark to prevent bombings since blue light couldn‘t be seen from airplanes
Wb7Y TIL there are two houses in Florida that share a backyard fence, but the shortest driving route between them takes 20 minutes and traverses more than 7 miles.
4XgYX TIL about the Controversy surrounding the Four Color Theorem which states that every map can be colored using only four different colors. The remarkable theorem is the first that had to be proved using computer-assistance.