In terms of scope, the accords relate to activities in orbit, on the surface, and in the subsurface of the moon, Mars, comets ...

The only way to create a sustainable program of exploring the moon and Mars with humans, beyond the initial flush of achievement, is by fully integrating science into our planning. We won’t be able to ...

U.S. plans to return Mars samples face delays as China advances its own mission. Scientists and policymakers debate costs, timelines, and the role of sample return in future Mars exploration ...