However, researchers have proposed a way to make Mars more habitable - by creating an artificial magnetic field to reduce radiation levels. But it might not have been always so.
The subsequent greenhouse gas effect would melt the vast stores of water ice, restoring some of the planet's oceans.
With an atmosphere, Mars was a temperate planet with surface water - but that was 3.5 billion years ago. Presented at the Planetary Science Vision 2050 Workshop, the proposal would see the deployment of a magnetic shield around the planet that could act as a barrier to radiation, and reduce the need for extreme protective equipment. Thanks to the greenhouse effect, a magnetic shield could allow the planet to reach half of Earth's atmospheric pressure in just a matter of years, according to an in-depth report by Popular Mechanics.
Speaking at the Planetary Science Vision 2050, Green said: "The solar system is ours, let's take it". Without a protective magnetic field, anyone living on the Red Planet would have to protect themselves from the harmful radiation from the Sun that we, on Earth, are shielded from. As a result, Mars gradually lost its atmosphere and went from being a warmer, wetter environment to the cold, uninhabitable place we know today.
Studies have revealed that by doing this, the atmosphere of Mars can be restored and terraform its environment which will allow liquid water to flow on the surface of Mars making life possible there.
USA space agency NASA has an innovative project that it is mulling over to make Mars habitable and it involves a giant magnetic shield. However, it could take decades before the atmosphere would be thick enough to make it habitable for humans.
NASA, SpaceX and many other space agencies are hopeful about colonising the Red Planet and the race is on for who gets to be the first.
To test the idea, researchers have conducted a series of simulations using their proposed artificial magnetosphere and found it is strong enough to counter solar wind and space radiation.
"It has been estimated that almost 1/7th of the ancient ocean of Mars is trapped in the frozen polar cap", write Green and his colleagues in the abstract for the proposal.
"This new research is coming about due to the application of full plasma physics codes and laboratory experiments", Green said. Green argued, would allow for human explorers to study the planet in much greater detail, and help determine its habitability, since numerous elements that pointed towards Mars being habitable in the past would slowly seep back into and onto the planet's environment. Ultimately it would mean Mars could begin restoring its atmosphere, 90 per cent of which has been stripped away by solar particles.