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TIL: That the odor you smell before it rains is ozone pulled from higher altitudes by the coming storm’s downdrafts.

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OGDGe TIL Not even 20% of japanese people have passports!
9wQV7 TIL the Great Horse Manure Crisis of 1894 refers to a supposed newspaper article that said because of horses, in "50 years, every street in London will be buried under nine feet of manure." It's an analogy for how new technologies (in this case cars) can take care of problems that seemed unsolvable.
9YwdQ TIL in 1963 Pennsylvania enacted its first "mandatory reporter" law, by 1967 all 50 states had similar laws, and the 1974 Federal Child Abuse Prevention and Treatment Act (CAPTA) created Federal expectations for mandatory reporters.
XEQKj TIL in Canada radio stations dedicated program blocks in off-peak hours to Canadian music. These program blocks became known as "beaver hours"
glKb TIL Giant kelp plant may grow to more than 148 ft (45 m) long at a rate of as much as 2 ft (61 cm) per day.