It’s probably a good thing Brent Bos wasn’t really on the surface of Mars. If he had been on the Red Planet, the former Zeeland resident might not be heading back home today. “We didn’t need any simulated drama. We had quite enough of the real thing,” Bos wrote in an e-mail as he entered his last week at a simulation site on Devon Island in Canada’s High Arctic. Bos, a researcher at the University of Arizona, completed 10 days of a simulated human mission to Mars at a site on Earth that most resembles the distant planet. The summer project, sponsored by the Colorado-based Mars Society, continues with other teams through August.