Firstly, sorry for the randomness of this thread, but it will hopefully make an interesting discussion point! We all know (shame on you if you don't!) that in the Hitch Hiker's Guide to the Galaxy, Deep Thought created a supercomputer to find out what the ultimate question to life, the universe and everything was, and that supercomputer was Planet Earth (until it was destroyed by the Vogons...) Anyway, are today's computers more powerful than the human species inhabiting this rock? The following is my own analysis, and some of it may not be technically correct - please feel free to correct it as necessary! The top-of-the-line mac pro comes with two quad-core processors clocked at 3GHz. It is my understanding that this gives an equivalent clock speed of 8 * 3 = 24GHz or 24 x 10^9 Hz. One Herz being one "cycle" per second, which I assume is one "simple calculation" per second. Now, let's assume there are around 6 billion people on this planet - assuming a billion is a thousand million, that's 6 x 10^9 people. So, if these people are combined "together" and made to do a simple calculation, they'd have to do four calculations per second (24 / 6) to equal the rate at which the Mac Pro does calculations. What is a simple calculation though? "n + 1" where 'n' is an arbitary integer? I reckon a human brain could probably do 1 + 1, 2 + 1, 3 + 1 and 4 + 1 in less than a second. So, what do you think? Are computers now more "powerful" than the human race? Could they work something out quicker than the entire human race working "as one"?