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TIL the “Law & Order” sound is “technically a piece of music”, so composer Mike Post gets a royalty every time it is played. Post calls the sound “ching ching” because he’s “making money off of it.”

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69dgX TIL some wasps can recognize each other’s faces
R7y4l TIL All grapes start out green. The white and red varieties start changing mid-summer.
yP4X TIL there are DVDs that look and smell like pizza when you are done watching them.
lowN7 TIL Peppermint Patty and Marcie didn't make their debuts in Peanuts until 1967 and 1973, respectively. That's why they don't appear in A Charlie Brown Christmas.
nW5OP TIL about the Weissenberg effect: when you stir certain unusual liquids, they sometimes climb up the stirring rod instead of being pushed outward. This strange behavior happens with some non-Newtonian fluids (liquids that don't flow like water) and is used in some manufacturing processes.