The first mammals were small, nocturnal, rodentlike creatures that skittered around the feet of dinosaurs for 140 million years.
Source: wiktionary
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The first mammals were small, nocturnal, rodentlike creatures that skittered around the feet of dinosaurs for 140 million years.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.