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TIL, spiked dog collars were once used to protect shepherding dogs from wolf attacks. Wolves would first go for the throat.

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8NxL TIL Anchorman Peter Jennings, who passed away from lung cancer in 2005, had actually quit smoking around 1985, but started the habit again from the stress of 9/11.
QJZw9 TiL that scallops are active swimmers, making them the only bivalve capable of migration.
ZZmQ TIL Scientists cut the nerve pathways that disable the body during REM sleep in cats to see them act out their dreams
Y7VYW TIL in the US, a private company can prosecute and incarcerate you themselves if they have enough money.
BgJPW TIL that sniffing glue is a dangerous thing for your health. It can lead to sudden death from heart failure, alongside other risks.