Today, most life on Earth is supported by oxygen. But ancient microbial mats existed for a billion years before oxygen was present in the atmosphere. So what did life use instead? Source: https://earthsky.org/earth/ancient-microbial-life-arsenic…
Tag: UV Radiation
Nearby red dwarf star not so quiet and life-friendly after all
Astronomers say the nearby red dwarf star Gliese 887 appears to have more dangerous flare activity than first believed. This could make life tough – but maybe not impossible – on its family of super-Earth planets. Source: https://earthsky.org/space/red-dwarf-gliese-887-flares-in-ultraviolet-light…