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TIL there's a species of salamander called Hellbender (Cryptobranchus alleganiensis) and honestly? The name fits

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via reddit.com

9wJ5X TIL darker skin people need more sunlight to make vitamin D. One experiment where a light skinned person was in sunlight for 8 hours saw their vitamin D concentration go up by 50x while a dark skinned person saw no change. They needed 5-10 times the sunlight length and then only saw a 30x change.
DQXMe TIL: "The Flintstones" were originally "The Flagstones" in their 1960 pilot film. The name was changed because the family in the "Hi & Lois" comic strip was also named Flagstone.
ADg8g TIL that, while filming The Wolf of Wall Street, Martin Scorsese suggested to Margot Robbie that her character Naomi would wear a robe to seduce Jordan. Margot insisted on being nude. She later explained: ‘‘The whole point of Naomi is that her body is her only form of currency in this world.’’
Qn7p TIL that the upside-down cross, sometimes associated with Satanism, is actually the symbol of St. Peter and his successors, the Catholic Popes.
b9gxp TIL that most of the flight team responsible for the Voyager spacecraft have had their jobs since the 1980s; the team's lead scientist is 81 years old