Of course, the Mars of today isn’t so hospitable—it’s atmosphere is nearly non-existent, riverbeds are dried up, and any water is now locked under Mars iron oxide-rich soil or CO2-filled ice caps. In other words, it isn’t a great place for humans, so luckily we’ve sent robots in our place to glimpse into our planetary neighbor’s geologic past.

Newfound rocks on Mars suggest the planet may have once sported an oxygen-rich atmosphere, making it more Earth-like and hospitable to life than previously thought.

LOS ALAMOS, N.M. (KRQE) – Scientists at Los Alamos National Laboratory say they’ve discovered Earth-like environments on ancient Mars. NASA’s Curiosity rover recently found higher than usual amounts of Manganese on Mars craters showing sediments ...