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| Well, conventions of beauty pretty much rely on symmetry. More symmetrical partners are probably more successful at reproduction and passing on more symmetrical phenotypes. I suspect this applies to non humans too...and it;s interesting to consider whether symmetry provides more robust functioning.
Even Jane Austen noticed asymmetry as a detriment to beauty in Pride and Prejudice.
As for the data...well individual manifestations are summed up across samples, populations, although you may mean something else. | |
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Still room for improvement, Dr. Who has two hearts.