A toxic gas that could help spawn life has been found on Enceladus

SAN FRANCISCO — For those delighted by the possibility of alien life, Enceladus, the wintry moon of Saturn, is a gift that just keeps giving.

Key compounds that could support alien microbes or help life emerge have been detected in the enormous plume of water that erupts from vents in Enceladus’ icy shell, biophysicist Jonah Peter of Harvard University reported December 15 at the American Geophysical Union annual meeting. These include hydrogen cyanide, which can be toxic to humans, though Peter noted it’s also “a key building block for synthesizing more complex compounds including amino acids, sugars and nucleobases, which in turn are precursors for proteins, RNA and DNA.”

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