After several months hanging out on the dark side of the Moon, China's Chang'e-4 lunar rover has really stepped in it according to NBC News.

The mission's rover, Yutu-2, came across a "gel-like" substance on its 8th day - which caused scientists to put a full stop on its planned schedule and try to figure out what exactly the goo is.

On July 28, the Chang'e-4 team was preparing to power Yutu-2 down for its usual midday "nap" to protect the rover from high temperatures and radiation from the sun high in the sky. A team member checking images from the rover's main camera spotted a small crater that seemed to contain material with a color and luster unlike that of the surrounding lunar surface. The drive team, excited by the discovery, called in their lunar scientists. Together, the teams decided to postpone Yutu-2's plans to continue west and instead ordered the rover to check out the strange material. -NBC News