Artwork showing the Earth now (right) compared to how it might have looked around 2.4 billion years ago, before the great oxygenation event. The continents back there bear no resemblance to their modern counterparts; the atmosphere would have been th...

In this animation, we see Mars in its present form, transitioning to a water world in its ancient past, billions of years ago. There is now overwhelming evidence that Mars once had large bodies of water - possibly even before the Earth did....

An impression of Mars in the past, when it was watery and probably volcanic....

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean epoch of the Earth's past, between 2.5-4 billion ye...

A vision of the landscape of Mars with water in the ancient past, when its atmosphere was thicker and warmer, seen from an altitude of a few hundred metres. This shows a view over a dried river estuary. There are hints of green, indicative of primiti...

Animation conceptualising the changing of Mars from a water planet to a dry desert. The clip begins showing Mars in the ancient past seen from a low orbit. We then step forward in time and watch as the water evaporates and Mars transforms into a dead...

Animation of erupting volcanoes, lava flows and storms on the primordial Earth. The Moon is seen in the sky through the clouds. At this early stage, the Moon was far closer to Earth than it is now. During the Archaean Eon of the Earth's past, between...

A vision of the planet Mars covered in water in the ancient past, when its atmosphere was thicker and warmer. This shows a view over Valles Marineris, the largest known canyon in the Solar System. There are hints of green, indicative of primitive lif...

A vision of the landscape of Mars with water in the ancient past, when its atmosphere was thicker and warmer. This shows a view over a terrain of impact craters flooded by seas. There are hints of green, indicative of primitive life....