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While few things could seem more remote, some scientists now believe that the earliest traces of life on Earth originated on Mars -- and parts of that planet are actually more hospitable to life than we previously thought.
Researchers from the Australian National University have determined that very large regions under the surface of the red planet may contain water and have sufficiently comfortable temperatures for Earth-based life -- albeit microbial life.
"We found that 3 percent of the volume of Mars is habitable in terms of having the right temperatures and pressures for liquid water and life," astrobiologist Charley Lineweaver told The Huffington Post by email. "The biggest surprise is that extensive regions of Mars could be habitable in terms of temperature, pressure and water."
The astrobiologist added that the bitter cold Martian surface temperature wouldn't be too brutal for humans.
"Think Antarctica," he offered. "Very cold but tolerable if appropriately dressed."
Originally posted by ProudBird
reply to post by Juston
Not sure about "underground".....I think there is still a great deal of that planet still to explore!!
However, in terms of Human habitation without the need for a full pressure suit, there is a region of an ancient impact (probably a large asteroid) that has lowered the overall average elevation, and allows the prevailing atmospheric pressure to exceed the triple-point of water.
It is the Hellas Planitia Region
SO, depending on the temperature, liquid water can exist (without immediately sublimating into the vapor state), and of course water ice too.
These "little portions" are roughly 500 meters in wide....
This Hellas Basin visible image is roughly 12 kilometers x 5 kilometers and inside it there are always the same geometric structures perfectly alligned.
We can only immagine what hide...