Before we explore the universe, robots will have to lead the way. And for them to find the best places to colonize will be to become self-sustaining.

Colony ships wouldn't just be small cities floating through space. They could become their own little, self-contained worlds.

One day, we'll make it to Mars. But before we do that, we have to answer a lot of questions and think really hard about why we're going.

Gravity can be tricky when you don't seem to understand how it works...

Taking a hypothetical trip to one of the most promising candidates for life outside our solar system.

We have the technology, the people, and the money. All we need to do is put the plans in motion.

Space will change what makes us human. Here's how it will happen.