Bergmann’s Rule Falsely Refuted

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A recent study of dinosaur sizes claims to break Bergmann’s rule.1 Bergmann’s rule was named after biologist Carl Bergmann, who in 1847 noticed that warm-blooded animals tended to be larger in cold climates compared to the same animal in a warm climate. Larger body mass tends to help an animal retain more heat, helping animals survive in the cold.

“The fossil record provides a window into completely d… More…

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