NASA astronaut Jeff Williams reflects on his career in space and what it would take to put humans on Mars.
Elon Musk wants to send humans to the red planet. But even our robotic presence there risks contaminating Mars with invasive microbes.
The SpaceX plan for building a Mars settlement includes refueling in orbit, a fleet of passenger ships, and the biggest rocket ever made.
Lockheed Martin just announced an audacious concept to put humans in orbit around Mars by 2028. Here’s how it would work.
The vibrant new map reveals Mars’ hidden geology and could help track the red planet’s seasonal swings.