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Most complete frog family tree shows they evolved later than ...
The 300 Million Year History of Amphibian Evolution - ThoughtCo
New amphibian family tree indicates they evolved tens of ...
Amphibian - Evolution, Classification, Adaptation | Britannica
Comprehensive New Amphibian Family Tree Revises Frog ...
New 270-million-year-old amphibian species could help explain ...
Frog - Wikipedia
9.1: The Evolution of Frog Life History Strategies
Surprises in evolution of frog life cycles | ScienceDaily
Frog Evolution – Blackburn Lab - Florida Museum