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TIL rats are capable of metacognition (the ability to think about one’s thoughts).

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jN8jR TIL in 2014, an associate professor from Georgia Southern University got investigated for offering extra credit for students who watched God’s Not Dead 1
5YZ9Q TIL that there is a star called "UY Scuti" with a diameter 1,700 times larger than that of the Sun's. It's so big that if placed at the center of our solar system its surface would reach past the the orbit of Jupiter and it would take a commercial airliner over 1,000 years to fly around it.
Q5Zk TIL the reason cocaine was removed from Coca Cola was not because people learned the negative health impact of the drug but because of racial fears on the part of white Americans
O8Va TIL when the French king Jean II was prisoner of the English, he was allowed to return to France to raise money for his ransom, leaving his son as a replacement hostage. When his son escaped, he voluntarily returned to England, citing reasons of “good faith and honor”.
yVPLw TIL consumption of crickets, mealworms or other insects can trigger an allergic reaction in people with shellfish allergies. This is true even for farm or pet store workers with occupational exposure to crickets.