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....

Artwork of the early Moon seen from a young planet Earth. The scene depicts a time period a few hundred million years after the Moon first formed. It was much closer to the Earth then, and continues to move away at a rate of 2-3cm per year. The Earth...

An artwork of the early Earth around 3.8 billion years ago, when its oceans were forming. Both the Moon (right) and the Earth are heavily cratered. There are two possible sources for Earth's water: it may have separated out from the rocks shortly aft...

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

Panoramic illustration of the Earth seen from an altitude of about 50 km (30 miles)....

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...

Illustration of a flight over a massive, Earth-like world, orbiting within the habitable zone of a K-type star. Worlds such as this are expected to be largely covered in deep oceans. As a result, most of the landmass is submerged, and the dry land sh...

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....

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 canyon system and river. There are hints of green, indicative of primitive life....

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...