"Ah, you're an Earther." He smiled widely, knowingly. "Could have guessed."

People from earth all had a similar way about them - a way they held their weight, in lower gravity, and a way their muscles were built. Alex had trained under one gee plenty, and in the pilot's seat had done more high gee burns than he cares to think about, but Mars' gravity was significantly lower than Earth's. His bones and his muscles just didn't grow the same way, as a child, even with the supplements. So it was easy to spot someone who'd lived on Earth, compared.

"Well, welcome to the rodeo. I'm a Martian, myself, but I've been out an' about for all my life, so if you have any questions or need any help at all, you just come to me."