Discovery of ancient riverbeds suggests Mars once wetter than thought

Scientists spot traces of 10,000 miles of rivers in area where many believed ‘there wasn’t any evidence for water’Thousands of miles of ancient riverbeds have been discovered in the heavily cratered southern highlands of Mars, suggesting the red planet was once a far wetter world than scientists thought.Researchers spotted geological traces of nearly 10,000 miles (16,000km) of ancient watercourses, believed to be more than 3bn years old, in high resolution images of the rugged landscape captured by Mars orbiters. Continue reading...

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