Ethan Siegel calls Mars "the obvious first step in our journey to the stars" and "part of our dreams for reaching out into the Universe." Last year thousands of people applied to join Mars One, a proposed colonization effort slash reality show that plans to put humans on the red planet in 2023. But unless Mars One wants to achieve ratings by broadcasting the death of its crew, it may want to cool its jets. Ethan says that without some heretofore unknown, top secret-technology, there's no hope for safely landing a capsule-full of "sensitive meatbags" (aka bachelors 1 through 3) on the surface…