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:
“‘The key is in the window, the key is in the sunlight at the
window—I have the key—Get married Allen don’t take drugs—the key is in the bars, in the sunlight in the window.
Love,
your mother’”
—Allen Ginsberg (b. 1926)
“The only rule is, do what you really, impulsively, wish to do. But always act on your own responsibility, sincerely. And have the courage of your own strong emotion.”
—D.H. (David Herbert)