In talk.origins Dylan sanoi, hitaasti kuin hämähäkki:

cousins who are still sighted but have not evolved the feelers? I'm
suggesting feelers because while you (and others) have suggested that
the blind cave fish could well be better fitted because they could
transfer some of their energy budget away from building/maintaining
eyes to something else. The theory makes sense. Any real-life examples?
Any thought-experiment examples? I learn best by contemplating
real-life examples. Thanks.

It takes a lot of developmental and maintenance energy to
run eyes. But I don't think you need to go as abstract
as an energy budget. You probably increase survival by
having less blood and fewer nerve endings concentrated in
such a vulnerable area.

rich

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