Well curently we can tamper with genes to create some pretty weird things. I could put extra legs on a fly's head or increase a monkey's muscle size. None of those examples are practical but the point is they are possible.
So it is possible, but is that it? Just a possibility? No in fact, humans have mutated before. About 7,500 years ago humans gained an incredible ability, the ability to process lactose. Now its not super strength but it is something, i mean, we all eat cheese.
If we leave mutations up to nature it is a much, much slower process. Animals adapt to survive, but not in a day. It takes hundreds of years for mutations and adaptions to show if any are needed. And humans change their environment to suit their needs, like if its cold you get a coat, not grow your body hair out 3 inches. This means no baby is probably going to be born today that can breathe under water or shoot webs out of his hands, probably.
If you think about it one way we already can mutate organisms in different ways. But the mutations you and I are looking for are much more difficult to achieve. The mutations we want are something that could allow flight or super vision. But the likelyhood of that happening is extremely slim. And if it did it would most likely show in small, slightly noticable changes to the DNA of organisms through time. If humans take the matter into our own hands its not a shoe-in either. There are very real and very serious side effects that could occur from tampering with genes. Godzilla-like monsters come to mind and are a possibility when going down this path, and all so man could one day grow a third leg or lift an extra 40 lbs. Is it worth it? Do the pros outway the cons? Or should stuff like this stay science fiction.
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