› added 4 years ago

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TIL adult cats rarely meow to each other, so an adult cat meowing to human beings is probably a post-domestication extension of meowing by kittens, a call for attention.

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l7Zpr TIL metal or blood by itself doesn't have a smell. The "metallic" smell of blood is instead derived from Fe2+ (iron) ions in metal/blood which react with fatty acids in sweat, forming 1-octen-3-one, which gives the characteristic "metallic" smell of metals and blood.
dKBE TIL that a blue whale’s blood vessels are wide enough for a human to swim through.
mxLVO TIL of the Pen-tailed treeshrew which is the only mammal that daily imbibes alcohol. It consumes the equivalent of 10-12 glasses of wine a night with no sign of intoxication.
ZLxp TIL a British soldier in WWII sent a taunting message to Hitler saying “You said in your last speech German troops would meet the British wherever they landed. Where are your troops?”
XNlX TIL that John F. Kennedy told the Secret Service to keep Jackie away from shipping tycoon Aristotle Onassis. She married him after Kennedy’s assassination.