Mars is the fourth planet from the sun and has a distinct rusty red appearance and two unusual moons. The Red Planet is a ...

The 20th century began with the exploration of the last unknown continent on Earth - Antarctica. So it's somewhat appropriate that as the century closes, another great act of polar exploration is ...

There is something quietly extraordinary about being seen from another planet. On Earth Day, Nasa shared a breathtaking reminder of just how small, how blue, and how lonely our planet truly is. The US ...

Scientists believe that future human settlements on Mars may rely on metals extracted from asteroids for construction.

The rusty world is full of mysteries—and some of the solar system's most extreme geology. Learn more about Earth's smaller, colder neighbor.

Landing humans on Mars could teach us whether life ever existed beyond Earth, how planets change over time, and how humans can live on other worlds. By studying Mars up close, astronauts could answer ...