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Mars Was Likely A Cold, Wet World 3 Billion Years Ago - IFLScience

Mars Was Likely A Cold, Wet World 3 Billion Years Ago - IFLScience

Mars Was Likely A Cold, Wet World 3 Billion Years Ago - IFLScience
Jan 17, 2022 40 secs

Publishing their findings in Proceedings of the National Academy of Sciences, they believe that their cold and wet scenario can explain the existence of a vast liquid ocean in the Northern Hemisphere of Mars, extending to its polar region.

However, the model needed to explain both the presence of a liquid ocean and ice-capped regions, like the presence of glacial valleys and ice sheets in the southern highlands.

If the ocean was frozen due to a very cold climate, these tsunamis would not have happened.

They calculated it was possible for an ocean to be stable even if the mean temperature of Mars was below 0°C (32°F), the freezing point of water, 3 billion years ago.

In this scenario, the ocean surface could be up to 4.5°C (40°F); not tropical but enough for water to stay liquid.

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