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Joined: Oct 2000
Posts: 1,346
veteran
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veteran
Joined: Oct 2000
Posts: 1,346 |
Human bilateral symmetry is truly only skin deep
Less than that really, wofa - there's that experiment/game where you stick a mirror vertically on a picture of someone's face (along the nose line) and produce two significantly different, though perfectly symmetrical, faces. There's actually something alien-looking about perfect symmetry.
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Joined: Mar 2000
Posts: 1,027
old hand
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old hand
Joined: Mar 2000
Posts: 1,027 |
though symmetry in the human body disappears when there is no adaptive pressure to retain itIn my view, this statement puts things upside-down: If you consider evolution of organisms, the more primitive was the more symmetrical, and each breach of symmetry represented a jump in evolution (spherical -> cylindrical -> flat with differentiated underside -> front-end and back end + left and right asymmetry). It was thus "adaptive pressure" that made asymmetrical organisms "win", roughly speaking. There are still highly symmetrical competitors around, like the viruses (do not re-start a thread about this plural  ).
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Joined: Oct 2000
Posts: 5,400
Carpal Tunnel
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Carpal Tunnel
Joined: Oct 2000
Posts: 5,400 |
the lack of perfect symmetry is why we don't usually like our own photos-- we are used to looking at ourselves in a mirror, and we get used to that view. in a photo, we don't have that reverse symmetry, and we don't look as we would expect.
it is very interesting to take a full frontal face view, slice it down the middle, and then make two perfectly symmetrical faces out of each half.. not to hard to do with a program like photoshop.
the three images are distictly different, and both look like the whole face, but the doubled right and the doubled left often don't look at all alike.
still, there is a good deal of evidence that the concept of beauty is linked to symmetry in the face.
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