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TIL that big name chewing gum is made up of rubber and plastics

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epAlg TIL that scientists in 1997 witnessed a massive battle b/w 9 sperm whales & up to 35 orcas off the coast of Cal. that "clearly establish for the first time that killer whales are predators of sperm whales." The "apparent helplessness of the sperm whales" was striking w/ maybe all 9 eventually dying.
DVLD TIL in WWII the Germans used “anti-officer crooked picture bombs”: They left paintings on the wall, skewed to the side and rigged to explode when straightened.
rNYMM TIL the oldest verified Austrian man so far is the accomplished mathematician Leopold Vietoris (1981-2002), who finished his thesis as a WWI's POW, fought in WWII at the age of 50, and wrote his last research paper at the age of 103
A5ya TIL there is a cave so big it has its own weather
j8DQ TIL A solar powered, self-filling water bottle has been invented for bike riders. It condenses atmospheric moisture.