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TIL that early American humans hunted car-size armadillos and used their shells for houses.

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GZ9N TIL that Ryan White, an HIV/AIDS spokesman in the 80s, was expelled from middle school after contracting HIV from an infected blood transfusion. 117 parents and 50 teachers campaigned for his ban, after being told that the students would catch HIV if they were in the same class as he was.
QJxwp TIL in Australia and the UK, crossing guards or cross walk attendants are commonly known as "lollipop men" or "lollipop ladies", because of the modified circular stop sign he or she carries, which resembles a large lollipop.
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
jNy8R TIL that cooking food allowed the human brain to develop and become the most advanced among all species. It allowed the food to releases more nutrients and hence allowed to meet the brain metabolic demand and even thrive. Gorillas spent 80% of their time eating although they have 1/3 of our neurons.
4XJGg TIL that the same company that made the Rugrats and Wild Thornberrys (Klasky Csupo) were hired by the McDonald’s Co. to make a 6 episode animated series called “The Wacky Adventures of Ronald McDonald”