An artistic representation of how Mars may have looked 4 billion years ago. Huge oceans cover the surface and could potentially allow life to exist. Maybe we can bring our red neighbour back to its former glory by terraforming it in the future.

This photograph was produced by the European Southern Observatory (ESO). https://en.wikipedia.org/wiki/Mars#/media/File:Eso1509a_-_Mars_planet.jpg

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