A team of astronomers recently announced that they've detected a possible sign of life on an exoplanet 124 light years away ...

K2-18b, a potentially habitable exoplanet 124 lightyears away, may contain biomarker DMS, but its habitability remains uncertain.

Even more enticingly, the exoplanet, dubbed K2-12b, was already suspected to be an ocean world. The biosignature is a molecule called dimethyl sulfide. On Earth, it's exclusively produced by ...