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Planetary science

Planetary science

Laughing gas could point to alien life on Earth-like planets

31 Oct 2022
TRAPPIST-1 exoplanets
Habitable zone: artist’s impression of the TRAPPIST-1 system, where four exoplanets are considered prime targets in the search for extraterrestrial life. (Courtesy: NASA/JPL-Caltech)
The presence of nitrous oxide in the atmospheres of Earth-like exoplanets could be a signature of th

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Sam Jarman is a science writer based in the UK
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