On the outskirts of Houston, four people have been living a version of the future that most of us only see in science fiction. For more than a year, they have been sealed inside a mock Martian base, ...

As the Orion, the world’s most advanced deep-space capsule, counts down to circumnavigating the Moon, that trek could be the forerunner to a cascade of Mars missions in the 2030s. Shown here is a ...