Quote:
Originally Posted by ernie
Sulfur is in the amino acids cysteine and methionine. Methionine is considered an essential amino acid because the body can not make it (doesn't mean different organisms couldn't make it).
Phosphorus is a major component of RNA, DNA, in cell membranes etc.
Nitrogen, carbon, oxygen and hydrogen are in every amino acid and, well, everywhere.
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So is there anything found in dry lake bed rock on earth that wasn't found on mars?