The experiment, simple in its design, took five years to complete.
These suspected caves could be gateways to Mars’ past, and to any future human presence.
“Have you tried turning it off and on again” is really good (if annoying) advice.
Curiously, Neanderthals in France stopped making fire when they needed it most.

Eruptions from volcanic arcs, found where tectonic plates converge, are one of the major drivers of natural carbon…
An expedition in the Red Sea found several brine pools that appear to be fed by underwater volcanoes,…