Primitive plants could survive and the sunlight that hits them, while weaker than on Earth, is enough for photosynthesis. However, Mars’ weaker gravity might struggle to hold its new atmosphere. Zach ...

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 ...