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TIL the leaf sheep sea slug can perform photosynthesis by eating algae and absorbing the chloroplasts

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l7LQN TIL that in 1977, Jimmy Carter penned a three-paragraph letter to accompany the Voyager spacecraft. Today, that letter is travelling beyond our Solar System at speeds of eleven miles a second. It is the first letter in history to reach extrasolar space.
oBbY8 TIL about potash evaporation ponds in the Utah desert. Depending on the amount of potash inside the pools, they can turn turquoise, orange, yellow and even white. About 700 - 1000 tons of potash are produced very day, which can then be used to fertilize plants and treat industrial water.
OGg51 TIL that we all started out as female fetuses, then some develop Y chromosomes while others don't; that's why men have nipples that don't do anything.
0wZaR TIL in 1977, a woman in New Mexico saw a burn mark in her tortilla that looked like the face of Jesus. She then built and ran the "Shrine of the Miracle Tortilla" until 2006 when the tortilla was dropped and broken during show-and-tell at a local elementary school.
rRYWd TIL Robert Henry Lawrence, Jr., was the first African American astronaut. The project he worked on would go on to become the International Space Station. He died in the backseat of his plane while teaching a cadet how to fly 50 years ago this past Friday (December 8, 1967). He was 32 years old.