Manicouagan Crater, Quebec, Canada, imaged in March by ESA's Sentinel-1A satellite. It was taken by radar and this is a false color view. The blue tones represent bodies of ice and some water, the yellow and orange tones denote ageing vegetation of different types, mixed with patches of snow and ice.

The crater is 214 million years old, created by an asteroid impact. It's one of the largest impact craters on Earth, the inner ring being 70 km (40 mi) in diameter and the multiple-ring structure about 100 km (60 mi) across.

Mona Evans
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