Motion and Change on Mars

In Aristotle's Physics, he said nature is a principle of motion and change.

Stuart Atkinson of UnmannedSpaceFlight.Com has new pics of Mars which confirm Aristotle's wisdom: Boulders a’bouncing on Mars….

They show movement, they show that things are moving on Mars right now. It’s not the dead, lifeless, corpse of a world I grew up with; it’s a world - we now know - where dust devils whirl and twirl across the plains… where clouds drift through the pale pink sky… and where huge stones fall from high cliff face, fall to the ground below, then bounce and roll and crash over it… unseen by anyone.

For now.