"To the best of our knowledge, the twenty-one original chemicals chosen by known life do not constitute a unique set; other choices could have been made, and maybe were made if life started elsewhere many times."
Paul Davies -leading authority in astrobiology, director of BEYOND: Center for Fundamental Concepts in Science and co-director of the ASU Cosmology Initiative.
A recent mathematical analysis says that life as we know it is written into the laws of reality. DNA is built from a set of twenty amino acids - the first ten of those can create simple prebiotic life, and now it seems that those ten are thermodynamically destined to occur wherever they can.
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