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TIL the word “blizzard” has a specific, technical definition. The National Weather Service defines a blizzard as a snowstorm with sustained 35 mph (56 kph) winds with visibility under ¼ mile (400m) lasting at least three hours.

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8a5RX TIL Owls have tubular eyes instead of spherical, making them unable to move their eyes in other directions. Instead of moving their eyes, they swivel their heads to view their surroundings.
XLZQ TIL CDs are 74 minutes long because the president of Sony wanted to listen to Beethovens 9th symphony without interruption
dOKB TIL that Edo-era Japanese samurais considered homosexuality as honorable, and teaches them virtue unlike the love of women was causing a “feminizing effect” and was deemed a necessity.
6Eljw TIL in several countries around the world, it is common practice to rent professional mourners when a prominent person dies. These hired mourners are also known as mutes or moirologists.
W499 TIL Beethoven hated giving piano lessons unless they were for exceptionally talented students or attractive young women of whatever talent. He was also a notorious space cadet and never learned how to multiply or divide