Curiosity Mars Rover

NASA celebrated the new year on Mars, which happens on Dec. 26 — days before the Gregorian calendar changes over to 2023 on Earth.

There may have been no oxygen in the atmosphere of ancient Mars after all, a new study has found, but don't despair, there still could have been living creatures crawling on the planet.

After a treacherous journey, NASA's Curiosity Mars rover has reached an area that is thought to have formed billions of years ago when the Red Planet's water disappeared.

With a worldwide shortage of plutonium-238, future planetary science missions are in jeopardy.

NASA had been splitting costs with the U.S. Deparment of Energy.

NASA is facing a plutonium shortage that may thwart future missions.

The Department of Energy has made its first plutonium-238 in a quarter century.

The search for signs of life, past or present, on Mars may have hit a stumbling blocks as new results show how the rovers will be unable to detect biomarkers on the surface.