A large ocean evidence has been founded on Mars.
A team of scientists has claimed that there was an ocean on the surface of Mars 3.5 billion years ago.
Such evidence of this ocean is the greatest proof of life on Mars.
This evidence of the ocean has been released by the researchers at Pennsylvania.
The climate in those days is still there today, it was quite harsh, cold and dry weather.
The team mapped data from NASA and the Mars Orbiter laser altimeter.
Due to a lot of changes over the years, there are many region where there is evidence of life on Mars.
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