### "Douglas Adams Was Right"

From KurzweilAI.net, an article by Seth Lloyd on the computational universe:

The amount of information you could process if you were to use all the energy and matter of the universe is 10^90 bits and the number of elementary operations that it can have performed since the Big Bang is about 10^120 ops. Perhaps the universe is itself a computer and what it's doing is performing a computation. If so, that's why the universe is so complex and these numbers say how big that computation is. Also, that means Douglas Adams was right (the answer is "42").Technically speaking, Adams proposed that it was the Earth that is a computer calculating the question to the answer "42," and not the entire universe, but it's nice to see that he was on the right track.

An interesting bit is when Lloyd computes the final end to Moore's Law:

if you want to know when Moore's Law, this fantastic exponential doubling of the power of computers every couple of years, must end, it would have to be before every single piece of energy and matter in the universe is used to perform a computation. Actually, just to telegraph the answer, Moore's Law has to end in about 600 years, without doubt. Sadly, by that time the whole universe will be running Windows 2540, or something like that. 99.99% of the energy of the universe will have been listed by Microsoft by that point, and they'll want more! They really will have to start writing efficient software, by gum. They can't rely on Moore's Law to save their butts any longer.If other civilizations exist in the universe, and if they're more than 600 years beyond us in computing technology, how have they solved this problem?