Mars Is Going Through a Bit of a Dry Spell. How Do We Know? Rusty Meteorites.

I love meteorites. I have quite a few myself; while I've never found one on a hunt I've bought them from collectors. There's a wealth of science in them; many are as old or even older than Earth, having formed in the early solar system. Others are from asteroids that got smacked by other asteroids, the impact sending out shrapnel that eventually impacted Earth. Of course, other planets get hit by them too. We've seen asteroid (or comet) impacts on Jupiter... but we've also seen meteorites on Mar...