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the junction between rocks in which the fossils of dinosaurs are found, and those above, in which dinosaur bones have been replaced by more modern creatures.» —“Experts clash over demise of the dinosaur” by Roger Highfield Telegraph (U.K.) Feb. 2, 2006.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
What if, instead of being an inanimate object, a dictionary were alive? That’s the idea behind a lavishly illustrated new children’s book called The Dictionary Story (Bookshop|Amazon) by Oliver Jeffers and Sam Winston. This is part of a...
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...