They haven't found any alien beings or spacecraft but NASA officials say the conditions on planet Mars could have supported life.

This is based on information gathered by NASA's Curiosity rover, which dug a hole in the surface of the Red Planet.

According to the Environmental News Service:

“A fundamental question for this mission is whether Mars could have supported a habitable environment,” said Michael Meyer, lead scientist for NASA’s Mars Exploration Program at the agency’s headquarters in Washington. “From what we know now, the answer is yes.”

The article says some of life's key ingredients were present:

Curiosity drilled into a sedimentary rock near an ancient stream bed in the Yellowknife Bay area of the Gale Crater. In the powder from the drill sample, scientists have identified sulfur, nitrogen, hydrogen, oxygen, phosphorus and carbon – some of the key chemical ingredients for life.

However, the conversation at this point is circling around 'ancient Mars'. In other words, no evidence, yet, of highly intelligent martians.