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TIL Gouldian finch young have unusual mouth markings that biologists find intriguing. One study showed the markings might help finch parents judge the health and age of their chicks. Another study revealed the glowing bumps outside of the beak reflect light, serving as a built-in beacon for feeding.

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4lAN TIL Pope John XII died whilst enjoying an adulterous sexual encounter outside Rome at the hands of an outraged husband.
446R TIL- To prevent mistreatment, dogs in the military are always higher ranks than their handlers
yV5Ba TIL the last full moon of the winter season is called the Worm Moon because it is when beetle larvae begin to appear after emerging from their winter hideouts... Bonus TIL the Farmer's Almanac has names for every full moon of the year.
bgN4 TIL the government only recognized Area 51 as an actual government location in 2003.
7EJX TIL that Peanuts creator Charles M. Schulz refused to use a laugh track for A Charlie Brown Christmas. He thought the audience should be able to enjoy the show without being cued when to laugh. When CBS executives saw the final product, they were horrified and believed the special would be a flop