Bilateral symmetry is only accurate to a first approximation
January 23, 2011 11:40 AM Subscribe
A large portion of the women I know (myself included) have breast asymmetry - one breast is larger than the other. I know this is unremarkable and pretty normal; humans aren't actually that symmetrical when you look closely. But I was talking about this with my girlfriend this morning and we noticed that for both of us, it's the left breast that is larger. Is there a species-wide skewing of left vs right breast for which one tends to be bigger? Does it follow handedness? Do men have noticeable asymmetry (presumably scaled smaller)? If it skews left, is there some whacked out evolutionary advantage of having the extra bit of padding over the heart?