The Big Questions: What is Life?

An excerpt from a recent article at MSNBC by Clara Moskowitz about the discovery of arsenic eating life forms:

“We don’t have a very good definition of life,” said researcher Christopher Voigt of the University of California, San Francisco, who works on synthetic biology. “It’s a very abstract thing, what we call life, and at what point we say something doesn’t have the necessary components versus it does, it just becomes way too murky.”

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