![The Two Sisters - Earth & Mars](/assets/artwork/1x1.gif)
The Planets
The Two Sisters - Earth & Mars
S1 E2:
Professor Brian Cox's continues his tour of the solar system revealing that it was once home to not one, but two blue planets. For millions of years, Mars enjoyed oceans blanketed by a thick atmosphere and a temperate climate. Whilst at the same moment Earth was afar less favourable habitat.