[jyl]

Human adults are changing due to better nutrition, medical care, and other conditions. But that, it seems to me, is not the same as evolution. Take a newborn baby from a prior era, feed them and give them medical care at today's levels, would they grow up indistinguishable from current humans? If yes, it is not evolution in my understanding of the term.

Remember all the sci-fi stories in which future humans had evolved to have big brains, small bodies, or whatever? That's what I'm talking about. And my theory, or question, is whether that can happen if all humans, regardless of individual traits and mutations, have essentially equal ability to pass on their genes.

The point Moses (?) made about more random mutations being able to survive, is interesting. But if those mutations dont affect the owners ability to pass on genes, will they really spread such as to cause humans to evolve, or will it simply mean more randomness in the genetic makeup of future humans?