A Planet’s Breathing Unveils the Mystery of Life ⚡ экспресс
A method for detecting life on exoplanets has been developed, going beyond merely measuring the abundance of biogenic gases in the atmosphere. It proposes estimating gas fluxes from the planet's surface by inverting a joint photochemical-climate model. The approach was tested on a synthetic 10-transit JWST NIRSpec Prism spectrum for TRAPPIST-1 e, where an Archean-type biosphere was assumed. As a result, CO2 and CH4 are reliably detected, and the CH4 flux into the atmosphere is constrained to within about 1.5 orders of magnitude (68% confidence interval) given precise knowledge of TRAPPIST-1's near-UV spectrum. The posterior distribution of surface gas fluxes is ~80% compatible with methane-producing metabolism. This shift from concentrations to fluxes increases the reliability of habitability assessments, although the results are sensitive to the assumptions of the model used.
The smell of fresh bread says a bakery is near. But to know if baking is happening right now, it’s the intensity of the scent — a stream of aroma from the oven — that matters, not just the smell itself. Same goes for hunting life on other planets. Before, we’d merely measure how much “living” gas was in the air — like judging the baking solely by the room’s aroma. But gases also pile up from non-living processes. The new method clocks how fast gases escape the surface, as if tracking the hot air gushing from an oven: a steady, warm flow means something’s baking inside. That’s how fresh microbial emissions get separated from ancient reservoirs. Scientists tried the idea on a model of planet TRAPPIST-1 e — a twin of early Earth. A virtual telescope captured light fingerprints of the atmosphere, and the model computed the fluxes. It nailed carbon dioxide and methane, with the methane flux pointing to living producers at 80% probability. It’s not a verdict, but a weighty clue. We’re after not just traces of life, but its breathing — right now.
🎯 In deep time (2.5–4 billion years ago), Earth life was already busily pumping out methane, but oxygen was nearly absent. An alien telescope would spot not oxygen but methane paired with carbon dioxide — exactly as in this study.
🎬 Sci-fi devices that instantly sniff out life from the air just got a step closer: this method brings smart atmospheric scanners nearer to reality.