Researchers have documented 55 instances of "mini lightning" over two Martian years by eavesdropping on the whirling wind recorded by NASA's Perseverance rover.

Bleached clay rocks found on the Martian surface suggest that the Red Planet was once home to heavy rainfall and tropical conditions, new Perseverance observations hint.

An unusual new rock collection discovered by NASA's Perseverance Mars rover suggests the Red Planet's ancient past was wet and tropical.

For the first time, scientists have mapped vast, continent-scale river drainage systems on Mars — ancient networks that may also be among the most promising places to search for signs of past life.

Even worse, the orbit of Mars is elliptical (think of a slight oval rather than a perfect circle), which means that sometimes the planet is closer to the sun than average (so it orbits more quickly, and the clocks slow) and that sometimes it’s farther out (so it orbits more slowly, and the clocks run faster).