Mega ocean existed on Mars

For many, many years on the Northern hemisphere there was a huge, huge ocean Mars. In the enormous area there was flowing water of rivers and streams, formed by heavy rains over the Red Planet.

This assumption was made by the authors of a global topographic map of Mars. It was made by a group of scientists from Northern Illinois University and the Institute of Studies of Moon and planets in Houston, United States and was published in the Journal of Geophysical Research, Planets.

The topographic map has been compiled based on computer algorithm analysis of images from Mars. It was found that Mars has an extensive network of valleys and channels on its surface with much higher rates than those considered so far.

For the first time a system of valleys on Mars was discovered in 1970.

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