quinta-feira, 29 de maio de 2014

O paradoxo de Fermi

So where is everybody?


Welcome to the Fermi Paradox.

We have no answer to the Fermi Paradox—the best we can do is "possible explanations." And if you ask ten different scientists what their hunch is about the correct one, you'll get ten different answers. You know when you hear about humans of the past debating whether the Earth was round or if the sun revolved around the Earth or thinking that lightning happened because of Zeus, and they seem so primitive and in the dark? That's about where we are with this topic.
In taking a look at some of the most-discussed possible explanations for the Fermi Paradox, let's divide them into two broad categories—those explanations which assume that there's no sign of Type II and Type III Civilizations because there arenone of them out there, and those which assume they're out there and we're not seeing or hearing anything for other reasons:

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