Mars may once have had fizzy springs percolating below its surface, scientists who have examined a Martian meteorite believe.

Monica Grady of London's Natural History Museum made a detailed analysis of the meteorite known as Allan Hills 84001 and found a variety of minerals that indicate carbonated water once flowed under the Martian crust."Mars may have been a warm and wet planet where water and carbon dioxide could freely exchange," she wrote in the science journal Nature.

Scientists are fairly sure that water once existed on Mars, but with the atmosphere now almost completely dissipated the only evidence for this is found in rocks.