Image: China National Space Administration/China News Service/Visual China Group via Getty Images

The Chinese rover vehicle Yutu-2 crawls cautiously across the rugged terrain of the dark side of the Moon. It takes photos as it moves, transmitting them back to mission control in Beijing. So far, things seem routine. But then Yutu-2 sends back an image of a mysterious gel-like, colorful substance lying in a little crater. This gets Beijing’s attention. What is this baffling substance and what’s it doing in a Moon crater?

Image: via Wikimedia Commons

Perplexed personnel at the Beijing Aerospace Command and Control Center have no idea what this material is. But they they want to find out more, so Yutu-2’s movement schedule is quickly modified. Instead of roving further afield as originally planned, it will now spend more time concentrating on this puzzling find.

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