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.

A circle running along the 27° east and 153° west meridians divides the globe into two halves with…
Computer simulations have uncovered a new manganese compound that could exist deep in Earth’s mantle and may be…