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TIL Arctic foxes don't start shivering until -94 °F / -70 °C
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VbOp
TIL There is a Bunyan tree that has been officially under-arrest (and chained) for over 100 years
nWv97
TIL hyenas are not dogs OR cats, but are so unique they have their own scientific family
jNg1M
TIL Intermittent fasting from dawn to sunset for 30 consecutive days is associated with anticancer proteomic signature and upregulates key regulatory proteins of glucose and lipid metabolism, circadian clock, DNA repair, cytoskeleton remodeling, immune system and cognitive function
680Y
TIL NFL cheerleaders are given extensive rulebooks governing their everyday behavior, including what conversations to avoid, when to change underwear, what tampons to use, when to wash their feet, how to eat meat, soup, and bread, and to “not be overly opinionated about anything.”
dDDJ9
TIL that Leo Marks, a WWII cryptographer, suspected that Germans had infiltrated the Dutch network in 1943 because all messages were being sent without any errors. To test his theory, Marks sent a message with "HH" and received "HH" in response. "HH" was a common German sign-off for "Heil Hitler."