› added 3 months ago

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TIL that human bones contain piezoelectric crystals that generate tiny electrical currents when stressed—your skeleton literally produces electricity when you walk.

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via reddit.com

pYooN TIL there's a difference between button-down and a button-up shirts. A button-down shirt has small buttons on the collar to keep it in place, while a button-up shirt has no collar buttons. Button-down shirts are more casual (for example in the choice of fabric) and button-up shirts are more formal.
rNLdd TIL there is a grizzly–polar bear hybrid, often called a grolar bear or a pizzly bear, a rare hybrid between a grizzly bear (Ursus arctos horribilis) and a polar bear (Ursus maritimus). These hybrids occur when the two species interbreed, typically in regions where their habitats overlap.
1POP TIL that extinction was only accepted as a fact in late 18th century after Georges Cuvier, the father of paleontology, disproved the old theory that it was impossible for species to go extinct because God wouldn’t wipe out a species he spent time creating for his Divine Plan.
wLJ87 TIL When dealing with persons in crisis, police negotiators need to keep the subject talking. However, the word “talk” should be avoided, as it often gets rejected by the subject: whereas “speak” seems to work in real crisis conversations.
ADEGn TIL that there is a species of ant that essentially use kamikaze tactics to protect their nest. When attacked, one or more workers will attach themselves to the attacker and explode their abdomen, thus releasing a toxic goo all over the attacker. These ants are aptly named Colobopsis Explodens.