(CNN) — Here’s a look at the exploration of Mars. The United States, Soviet Union and China are the only three countries to land a spacecraft on Mars. There have been nine successful US Mars landings: ...

Tune in today, July 24, at 1:30 p.m. ET for a LIVE This Week In Space taping to mark the 50th anniversary of the Viking landings on Mars. What might seem like a simple black-and-white picture of some ...

Mars has captured human imagination for centuries, but the Red Planet holds far more secrets than NASA typically shares with the public. While the space agency presents Mars as a fascinating but ...

Facts There have been nine successful US Mars landings: Viking 1 and Viking 2 (both 1976), Pathfinder (1997), Spirit and Opportunity (both 2004), Phoenix (2008), Curiosity (2012), InSight (2018) and ...

Skylights, openings in the surface of Mars that descend down into caves, have been found on Mars, along with signatures for the presence of water ice. New images from the Mars Express orbiter reveal ...