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TIL We Used To Sleep In Two Segments Every Night Until Electricity Was Invented

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QVPp TIL that “generic” and “specific” are derived from “genus” and “species” and were originally scientific biological terminology
Z88jG Cats do not only protect against asthma, scientists speculate that they could also help fight obesity and diabetes.
4kxLR TIL - LED’s are made on a substrate of Gallium Arsenide, which is half Arsenic
vPaoD TIL of the "Great Smoke Pall" of 1950, a change in the skies from wildfires in Canada. The wildfires weren't well publicized, so there was speculation that the skies changed due to reasons such as secret U.S. military experiments, supernatural forces, and alien invasion.
4Xme6 TIL In 1955, June Bacon-Bercey became the first African-American woman to receive a degree in meteorology; she went on to become America’s first female TV meteorologist.