the odds...

“It is known that there are an infinite number of worlds, simply because there is an infinite amount of space for them to be in. However, not every one of them is inhabited. Any finite number divided by infinity is as near nothing as makes no odds, so the average population of all the planets in the Universe can be said to be zero. From this it follows that the population of the whole Universe is also zero, and that any people you may meet from time to time are merely products of a deranged imagination.”

Douglas Adams

Nota pessoal: Na realidade não temos a certeza que o Universo seja infinito.. e a integração sobre um volume infinito tem as suas surpresas para o senso comum... mas o argumento é brilhante...