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Discussion and Debate
Discussion and Debate
Physical & Life Sciences
Creation & Evolution
Are we evolving?
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<blockquote data-quote="Bombila" data-source="post: 44603176" data-attributes="member: 170397"><p>I'll stick to expressing an opinion about the evolution of living things. No species stops evolving. Species may change/evolve very slowly, but they continue to interact with the environment, whether that be exclusively zoos or the natural setting.</p><p> </p><p>It might be that species present only in zoos slowly evolve (or at least be human selected) to be more suited to that environment. For example, elephants that attack keepers are usually removed from the breeding population/euthanised. You could argue that the zoo environment, including the humans that maintain it, <em>are</em> the environmental niche these animals find themselves surviving in, and being less prone to violent behaviour will give them an edge in reproducing and surviving. Give it a few thousand years, zoo elephants might be very non aggressive (with a possible side effect of being very stupid). But that's a sticky example, because essentially, the humans are doing the selecting.</p><p> </p><p>Humans are certainly evolving. I suspect wisdom teeth will become a thing of the past eventually. Already, some humans don't develop all their wisdom teeth, or they are not fully developed. Mine, for example, and most of those of my direct family members were either little rootless nubs, or one or two had roots, or they were deficient in enamel, or one or more never appeared at all. But that could be strictly a familial genetic error, and I don't know how widespread that is. Certainly many people must have them removed, as the jaw doesn't really have room for them.</p></blockquote><p></p>
[QUOTE="Bombila, post: 44603176, member: 170397"] I'll stick to expressing an opinion about the evolution of living things. No species stops evolving. Species may change/evolve very slowly, but they continue to interact with the environment, whether that be exclusively zoos or the natural setting. It might be that species present only in zoos slowly evolve (or at least be human selected) to be more suited to that environment. For example, elephants that attack keepers are usually removed from the breeding population/euthanised. You could argue that the zoo environment, including the humans that maintain it, [I]are[/I] the environmental niche these animals find themselves surviving in, and being less prone to violent behaviour will give them an edge in reproducing and surviving. Give it a few thousand years, zoo elephants might be very non aggressive (with a possible side effect of being very stupid). But that's a sticky example, because essentially, the humans are doing the selecting. Humans are certainly evolving. I suspect wisdom teeth will become a thing of the past eventually. Already, some humans don't develop all their wisdom teeth, or they are not fully developed. Mine, for example, and most of those of my direct family members were either little rootless nubs, or one or two had roots, or they were deficient in enamel, or one or more never appeared at all. But that could be strictly a familial genetic error, and I don't know how widespread that is. Certainly many people must have them removed, as the jaw doesn't really have room for them. [/QUOTE]
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