<Mars is not Earth-like; Mars is Mars-like, dammit.

And nocturnal animals come out at night, truer words were never spoken.

That said, there are geological (geochemical, geophysical...) systems on Earth which parallel current or extinct systems on Mars and which contribute to the understanding thereof. One must keep in mind the significant differences however.

The Earth and Mars are very different planets, and the sooner you and your friends realize this, the happier everyone else is going to be.

Chris understands this. I understand this. And most others do as well. It's not so hard to understand.

What is hard to understand apparently is that we do undersand this and continue with these excersizes. Yes? Something like that?