The European Space Agency's Mars Express has revealed strong evidence that an ocean once covered part of Mars.

New analysis of data sent back by the SPICAM spectrometer on board ESA's Mars Express spacecraft has revealed for the first time that the planet's atmosphere is supersaturated with water vapor.

ESA has now firmly entrusted its precious Mercury explorer to Europe’s largest rocket – the Ariane 5.

A NASA-led team has used radar sounding technology developed to explore the subsurface of Mars to create high-resolution maps of freshwater aquifers buried deep beneath an Earth desert, in the first use of airborne sounding radar for aquifer mapping.

The European Space Agency (ESA) said on Friday that it has discovered a crater on Mars that was once filled by a lake.