K-T boundary
n.— «This clay marked what scientists call the K-T boundary, the junction between rocks in which the fossils of dinosaurs are found, and those above, in which dinosaur bones have been replaced by more modern creatures.» —“Experts clash over demise of the dinosaur” by Roger Highfield Telegraph (U.K.) Feb. 2, 2006. (source: Double-Tongued Dictionary)
Further reading
In 1971, when a new public library opened in Troy, Michigan, famous authors and artists were invited to write letters to the city’s youngest readers, extolling the many benefits of libraries. One of the loveliest was from E.B. White, author of...
Cat hair may be something you brush off, but cat hair is also a slang term that means “money.” In the same way, cat beer isn’t alcoholic — some people use cat beer as a joking term for “milk.” And imagine walking on a...