Mars, often seen as a dusty ... Wind, waves, and plenty of sand—just like an old holiday spot.” “They don’t resemble dunes, craters, or lava flows,” said geophysicist Michael Manga ...

Oh, this is the old city on Mars,' the man at the counter told him. McMoneagle was given negatives of the Martian landscape, showing a pyramid-shaped structure on the edge of a giant impact crater.