Scientists are trying to learn how small an exoplanet with an atmosphere can be. When you purchase through links on our site, ...

Viking 1 landed on Mars 50 years ago, so why haven't we sent people there? Because there are no property rights in space ...

Elon Musk is trying to own it, competing powers are trying to fight in it and nobody seems to be regulating it. So who does space really belong to?

The idea of turning Mars into a planet where humans could one day live has fascinated scientists and science fiction fans for ...

Terraforming Mars has crossed from science fiction to a structured scientific research agenda, according to a peer-reviewed ...

This Viking 1 image is one of first images of a sunset as seen from the surface of Mars. It shows the Chryse Planitia region ...

For years, as we inch closer to sending people to Mars, scientists have worried about whether Earth microbes could survive on ...

Astrophysicist and science writer Adam Becker discusses why the dream of life on Mars may be out of reach, maybe for centuries to come.

Scientists say new technologies have reopened the debate over whether Mars could someday be terraformed, turning a once ...

In this roundup of space news, we talk about sugar molecules in space, a call for volunteers for a simulated Moon/Mars mission and next steps for NASA's New Horizons probe.

The Viking I and II missions at the nation’s bicentennial were among the most successful missions in the annals of space ...

Sending humans to Mars and returning them safely to Earth would be one of the most complex endeavors that humans have ever carried out. The number of issues that must be dealt with simultaneously is ...