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TIL During courtship, the male Pigeon Mountain Salamander circles the female and bites her repeatedly to break the skin on her head. He then rubs a chin gland over the wounds, injecting pheromones directly into her bloodstream to subdue her enough for mating.

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8eMvK TIL Jimmy Carter is the only US president who has reported seeing an UFO
RYn4 TIL baby spit backwashes into the breast during breastfeeding so the mother’s body can adjust the breastmilk composition based on the baby’s health
wM9J TIL many Americans who need mental health services never get it because doing so could disqualify them from receiving life insurance
WLL4 TIL that, prior to the American Civil War, most citizens of the United States referred to their country in plural (“The United States are wealthy”, “The United States have a large population”)
yQN1e TIL of the PUPPERS Act, which protects dogs from inhumane experimentation.