Could Life’s Earliest Stages Have Survived Without a Key Ingredient?

“CHNOPS” is one of science’s most revered acronyms, an amalgamation of letters that rolls of the tongues of high school biology students and practicing researchers alike. It accounts for the six elements that comprise most biological molecules: carbon, hydrogen, nitrogen, oxygen, phosphorous, and sulfur.

Biologists have traditionally assumed that all six elements were prerequisites, as each one is found in several of life’s most essential molecules. But what if earlier life forms weren’t

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