Curiosity Mars Rover

NASA's Curiosity Rover has caught its first image of the sunset on Mars as it began a new campaign observing clouds over the Red Planet at twilight.

NASA's Curiosity rover has rolled up on another meteorite on Mars, an iron-nickel rock the mission team has dubbed "Cacao."

Opals, which contain a lot of water, have been found on Mars. They might be an indicator of past life and possibly a source of water for astronauts in the future.

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.