<p>It's well established that Mars used to be a wet world covered in oceans, and in recent years, astronomers have uncovered not just icy remnants of this period, but entire reservoirs of liquid water still lurking beneath the planet's arid surface. But we're still far from having a complete picture of what the Martian climate looked like billions of years ago before its oceans dried up. Now, however, the chance discovery of pale yet unremarkable looking rocks by NASA's Perseverance rover suggest that the Red Planet was not only wet, but much warmer than once believed, according to a new […]</p>