On Tuesday, SpaceX founder Elon Musk gave his most detailed plan to date for how he’s going to create a human space colony on Mars. His plan involves reusable rockets, methane fuel, and solar panels ...

Elon Musk has repeatedly said he plans to put humans on Mars, yet the gap between that vision and reality remains wide. The obstacles are not just about rockets or money, but about biology, psychology ...

The three astronauts on the mission to be the first humans on Mars don’t even get to the surface before the trouble starts. They enter the Martian atmosphere wrong, half crash-land in a spot not quite ...