Observatory: Mammals? Rise Began Before Dinosaurs? Fall, Study Finds

[unable to retrieve full-text content]Analyzing changes in the teeth of rodentlike animals that lived in the age of dinosaurs, researchers concluded that mammals began to diversify and flourish well before dinosaurs went extinct.

Source: http://feeds.nytimes.com/click.phdo?i=bb303264fd836acca7a1612d60d4238e

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