Rhythmic bedding in sedimentary bedrock within Becquerel crater on Mars is suggested by the patterns in this image from Nasa's Mars Reconnaissance Orbiter released last December. ReutersFrom The Independent:
Mars may have once been both cold and wet, researchers said today, suggesting a freezing Martian landscape could still have produced water needed to sustain life.
There has been debate over the issue because with some researchers believing water likely formed many features of the planet's landscape and others pointing to evidence indicating that early Mars was cold with temperatures well below the freezing point of water.
Using a computer model, Alberto Fairen of Universidad Autonoma in Madrid and colleagues showed that both could have been possible because fluids containing dissolved minerals would have remained liquid at temperatures well below 273 degrees Kelvin - the freezing point of pure water.
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