New perspectives on ancient Mars, Science, 307, 1214-1220.

That turned out to be various types of salt, presumably left as water evaporated on ancient Mars.

Jekkara was formerly a port city and a prominent kingdom in ancient Mars.

Just before dark she was carried over one of the deserted cities of ancient Mars.

We're pretty sure nothing like grass ever grew on the surface of ancient Mars, even back in the warm and wet period.

"Already, there are environmental groups trying to preserve original, ancient Mars from us invaders."

I am always interested in these deserted cities of ancient Mars.

A dead city of ancient Mars.

Both made important discoveries about wet environments on ancient Mars that may have been favorable for supporting microbial life.

A right royal tribunal indeed, and such a one, I warrant, as never before sat together during all the history of ancient Mars.