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TIL there is no such thing as "Nitrate free" bacon or other preserved meat. If they claim this they probably substitute Celery Salt which has sodium nitrate as well and can cause cancer all the same.

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5YNbR TIL of viruses that attack bacteria called ‘bacteriophages'. The term phage originates from Greek phagein, which translates as ‘to eat'. A single phage injects its genome into a bacterial cell, switching the cells' program in its favor. The host cell eventually dies, releasing about 100 new phages.
kOW9m TIL that since Mount Rushmore is carved out of solid granite, which erodes 1 inch every 10,000 years, the basic shape of the faces will last up to 7 million years (though their noses will only last 2 million)
ANRra TIL that rhinoceros mating can be brutal. First the males fight for dominance. Then the female chases the male. This is called a "bluff and bluster" ritual, & lasts hours. It often becomes violent, with wrestling and fighting. Sometimes it can even lead to death.
JY7E1 TIL in 2012 Taylor Swift held a contest where she would perform at your school. Internet trolls hijacked the contest allowing a school for the deaf to win. She backed out of the performance and sent a check instead.
P11Zw TIL about Rattlesnake Kate, a Colorado resident who killed 140 of the serpents with a metal signpost in a single battle & later learned to collect venom to save lives. Her snake dress is on display in Greeley (where Al-Qaeda got its roots.. that's a different TIL)