Well, all of that energy that we devote to beating gravity could be devoted to brain power I suppose, but the human body would have to become more resistant to radiation. I have actually seen this theory on the Discovery Channel, a body with essentially all arms (no real need for legs per se).

Unfortunately I fear the next probable step in human evolution will likely be man inspired revolution in the form of genetic manipulation. There are definitely genes that you could alter that wouldn't inspire much condemnation (ie. if tthey found a way to eliminate the gene for male pattern baldness), but where do you draw the line? Talk about an ethical can of worms!

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