While some Earth-like worlds can generate significant O2 only by biology, “waterworlds” and “desert worlds” can build up O2 even without life because of chemical changes from atmosphere loss to space.
Algún día, un catálogo de fragmentos moleculares podría ayudar a científicos a identificar vida extraterrestre en las lunas heladas de nuestro sistema solar.
A new analysis of South African sediments hints that acidic lakes may have leached minerals necessary for biotic life.
A new study of seafloor sediments finds that the temperature record in the early Paleozoic corresponds to significant shifts in the diversity of life on Earth.
A new analysis of iron meteorites reveals a distinct isotopic signature that suggests nitrogen was present around early Earth.
Someday, a catalog of molecular fragments might help scientists identify extraterrestrial life on our solar system’s icy moons.
New analysis indicates that planetary feedbacks alone don’t make habitability an inevitability.
Thom Moore began his career after the start of the space age. This is the story of how he converted his interests in evolution, philosophy, and psychology and writing into the study of heliophysics.
Earth’s global magnetic field likely dates back billions of years and is a barrier against cosmic radiation. What roles has it played in the planet’s biosphere?
An instrument called WATSON can help find biosignatures on icy ocean worlds.