Life on Mars's potential is a significant interest to astronomers due to its proximity and likeness to Earth. So far, there has been no evidence of life in the past than today on the Red Planet. However, a discovery made by scientists at the European Space Agency (ESA) yesterday could have been the "Holy Spirit" scientists.
Pictures taken by the signs team showed that liquid water once flows onto the surface of the planet.
The incredible satellite images revealed what looks like an ancient and complex system of ditches, valleys and dry river beds, suggesting previous life.
Unitary systems are seen on Earth, such as the Yarlung Tsangpo river, which runs from western Tibet through China, India and Bangladesh.
In the case of Mars, ESA said that the branching waterways were most likely due to the extinguishing of surface water from powerful rivers and extensive rainfall.
In 2007, John Zarnecki, Professor of Space Science at the Open University, told BBC Radio 4 listeners how important it was possible to find such a way to find life.
He said: "The Holy Life Core is water.
"Find the water and then you have the chance to find life, as long as we'll understand, you need water to survive.
"But it may also be able to support primitive life – so there could be some sort of life that we can not imagine.
"Over the last 25 years, it has been described as being quite unlikely to be able to support life, but the button is swinging. "
Although Mars is not now holding fluid water on its face, life forms may still survive beneath the surface, something that the ESA looks for.
A statement reads: "A magical question raised by this warmer and wetter climate is whether conditions would have been suited to life – a topic at the heart of the Mars investigation.
"Next year, ESA and Roscosmos will launch the ExoMars mission that involves rolling – recently named Rosalind Franklin – and a surface science platform.
"The rush will drive to interesting venues to drill beneath the surface to look for signs of life – the first mission of a type."