Why do even olympic level swimmers (especially women) appear to have a "thin layer of fat over muscle" look rather than having the extreme muscle definition of say, sprinters? [more inside]
posted by true on Jul 4, 2008 - 13 answers

How are memes anything other than an extension/expression of the extended phenotype? [more inside]
posted by whatgorilla on Mar 11, 2007 - 20 answers