Sunday, September 19, 2004

Como podemos procurar algo que não sabemos o que é?

"...we lack a definition of life that can guide a search for life outside Earth. (...)
"with only one example of life—life on Earth—it is not all that surprising that we do not have a fundamental understanding of what life is. We don't know which features of Earth life are essential and which are just accidents of history."

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