New research suggests that many of Mars’ valleys were gouged by icy glaciers not rivers. — AFP pic
Researchers from Canada and the United States examined more than 10,000 Martian valleys and compared them to channels on Earth that were carved under glaciers. But these formations come in a huge variety “suggesting that many processes were at play to carve them,” she added. The study authors said their findings suggest that some Martian valleys could have been formed some 3.8 billion years ago by meltwater beneath ice sheets, which they said would align with climate modelling predicting that the planet would have been much cooler in its ancient past.
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