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Scientists at UC Riverside are suggesting something is missing from the typical roster of chemicals that astrobiologists use to search for life on planets around other stars—laughing gas.

Chemical compounds in a planet's that could indicate life, called biosignatures, typically include gases found in abundance in Earth's atmosphere today.

"There's been a lot of thought put into oxygen and methane as biosignatures. Fewer researchers have seriously considered , but we think that may be a mistake," said Eddie Schwieterman, an astrobiologist in UCR's Department of Earth and Planetary Sciences.

This conclusion, and the modeling work that led to it, are detailed in an article published today in The Astrophysical Journal.

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