Humans simply can't get any smarter

We've invented penicillin, space shuttles, computers and even artificial hearts, among many other wonders. So where will human intelligence go from here?The answer, if certain scientists are correct, is nowhere. Mankind's brain power has reached its peak and it is physically impossible for us to become any smarter, they say. They claim that in order to become any more intelligent the human brain would need vast amounts of extra energy and oxygen — and we simply cannot provide it.Cambridge University researchers have analysed the structure of the brain and worked out how much energy its cells use up.Simon Laughlin, professor of neurobiology, said: "We have demonstrated that brains must consume energy to function and that these requirements are sufficiently demanding to limit our performance and determine design.""Far-reaching powers of deduction demand a lot of energy because, for the brain to search out new relationships it must constantly correlate information from different sources. Such energy demands mean there is a limit to the information we can process."Other scientists claim that the brain's ‘wiring' or network of fibres linking different areas to one another cannot get any better.Scientists claim that the wiring would need vast amounts of extra energy to become more efficient. As before, they say it is impossible for humans to provide this, therefore we cannot get cleverer. From / Gulf News