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TIL the law requiring American TV news stations to provide viewers with contrasting points of view, called “The Fairness Doctrine”, was eliminated in 1987.

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5XEB TIL that teenage pregnancy reached its lowest point in 2010
PYZgG TIL “that when we see really ancient images of far off and very, very old objects, that light has traveled from that star through the universe for sometimes billions of years and the first object it hit was our telescope detector.”
O9A7 TIL when Dr. Jonas Salk (discoverer and developer of the first polio vaccine) was asked who owned the patent he replied “There is no patent. Could you patent the sun?” Forbes calculated the vaccine to be “worth” 7 billion dollars. Happy 100th birthday you magnificent bastard.
Br60L TIL 4 Canadian wolves were air-dropped into Isle Royale National Park in Michigan to boost the park's wolfpack to 8. The extra wolves were brought in to help keep the moose population in check, thereby preventing mass starvation of the moose herd.
jN6KR You probably know that your visual perception of the world is a bit different than your pets’. Dogs see things with less color than humans, snakes can see infrared, and if you have a pet bull, it lives in a world where red and green are the same color. This brings up a good question. Why do you have a pet bull? You should get a cat instead, and when you do, it is important to know that your new friend can’t focus on objects farther than 20 feet away. The point is, animals have evolved to see in a variety of ways. But how can we see things through their eyes? Marine biologist and National Geographic Emerging Explorer David Gruber collaborated with a research team to develop lights and camera filters that allowed him to do just that, underwater. Through their work, the team discovered biofluorescence in an abundance of aquatic species. This “glowing” trait has to do with how an organism absorbs and emits light. Research has indicated that this radiance is possibly used for communication and camouflage. One caveat: You need a certain species of eyes (or David’s camera) to see it. Swell sharks (Cephaloscyllium ventriosum) have fluorescent proteins inside their skin, which are triggered by the ocean’s blue light, becoming visible to other swell sharks. David’s camera has special yellow filters that allow the simulation of a swell shark’s vision. It turns out there is a massive rave going on 500 meters below the ocean’s surface, and one of the glowing guests is a type of cat shark!