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Mars may have been more Earth-like than thought: Compounds in Martian rocks hint at high levels of oxygen and liquid water
Earth’s red neighbour may once have been more like our home planet than we thought.
Chemical compounds found in Martian rocks suggest the planet’s atmosphere contained higher levels of life-sustaining oxygen, as well as pools of liquid water.
The discovery was made by Nasa's Curiosity Rover, which, has been periodically chewing up Martian rocks and tasting the chemicals to build up a picture of the planet’s history.
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