A model based on Earth’s oceans and atmosphere explains how Mars could have been cold and wet 3 billion years ago
“If we could travel in time 3 billion years ago, we could live on this ancient Mars with just a spacesuit for oxygen,” says Schmidt. “Pressure, clouds, liquid water, ocean, rain, snow and glaciers: all of them were very similar to Earth today. Only oxygen was missing.
”at Imperial College London, but it is only a simulation. “The authors pull together observations from other studies with evidence for an ocean to tie into their results, but proof of an ocean does not come from the modelling. We would need stronger geological evidence for an ocean,” he says.
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