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164

TIL that ancient Romans used human urine as a mouthwash: Due to its ammonia content, urine was used as an ancient form of teeth whitening and stain removal.

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via reddit.com

woxN7 TIL of the New Guinea Singing Dog, a breed of dog native to the mountains of Papua that don't bark. Instead, they make "yodeling" noises. It is also the closest relative to the Australian Dingo.
mxp5E TIL that Oville Wright, who co-invented the airplane, lived til 1948. So he made the first working airplane in 1903 and say Chuck Yeager break the sound barrier just 43 years later.
NrZJ TIL Jazz great Ella Fitzgerald by age 18 had taught herself to sing 2 notes at once like Mongolian folk singers!
8axbK TIL that the average height of a male in the Netherlands has gained 20 cm (eight inches) in the last 150 years, according to military records.
9OOG TIL the RMS Lusitania carried undeclared war munitions as cargo. It was also originally designed to be converted to a warship by the British government