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TIL the first food and drink consumed on the Moon was communion by Buzz Aldrin

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VMoMD TIL an underwater cave in southern France has >20,000 year old cave art on its walls, made when sea levels were lower. The art depicts Auks, Bison, wild horses, and more.
4XjVX TIL of the $23 million dollar toilets designed by NASA for deep space missions. With odor control being a serious issue, NASA pays certified sniffers to smell the toilets after they've been used to evaluate odor-control measures. The lead engineer calls them the "unsung heroes of the space program".
69eWJ TIL porcelain dentures included traces of uranium up until the mid-1980s, the idea was the fluorescence provided by uranium would better mimic the colour of natural teeth
xg91 TIL Ringling Bros. Barnum & Bailey circus has retired all but 11 elephants and will retire those 11 after a final show May 1st, 2016. The elephants will go to a Florida conservation where they help with cancer research, as they possess a special “P53 gene” which fights cancer.
Vn8Q TIL there is a mile-long zipline in Hoonah, Alaska, that starts 1,300ft above sea level and reaches speeds of up to 60mph.