Blue, Not Red: Did Ancient Mars Look Like This?
astroengine writes "Using elevation data from NASA's Mars Reconnaissance Orbiter, software engineer Kevin Gill was inspired to create a virtual version of the red planet with a difference. 'I had been doing similar models of Earth and have seen attempts by others of showing life on Mars, so I figured I'd give it a go,' Gill told Discovery News. 'It was a good way to learn about the planet, be creative and improve the software I was rendering it in.' He included oceans, lakes, clouds and a biosphere — a view of a hypothetical ancient Mars that looks wonderfully like home."
This is where using 2-3 minutes to read the fine article would have helped you out.
It is a software guy who just wondered what it would look like with earthly features. This is not based on any kind of facts other than the elevations.