Allen's rule is a biological rule posited by Joel Asaph Allen in 1877. It states that endotherms from colder climates usually have shorter limbs (or appendages) than the equivalent animals from warmer climates.
Read more about Allen's Rule: Theory, Mechanism, In Humans, Examples in The Animal Kingdom, Other Factors
Famous quotes containing the words allen and/or rule:
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You just stood there grinning.”
—Bob Dylan [Robert Allen Zimmerman] (b. 1941)
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Shall reap no gain where former rule hath taught still peace to
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No foreign banished wight shall anchor in this port;
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—Elizabeth I (1533–1603)