A Planet’s Breathing Unveils the Mystery of Life ⚡ экспресс
Instead of simply measuring concentrations of biogenic gases, the new method reconstructs how much gas is coming from the planet's surface. This is done by inverting a joint photochemical-climate model. A test on a synthetic JWST spectrum for TRAPPIST-1 e with an Archean biosphere showed that the methane flux can be constrained to within about 1.5 orders of magnitude. Probability assessment: ~80% of cases are compatible with methane-producing metabolism. This approach is like not just smelling smoke, but looking for the campfire.
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.