Chang'e 4, the first spacecraft to land on the far side of the Moon, was photographed by the Yutu rover, whose tracks are visible to the right of the lander. Another Chinese mission, Chang'e 5, brought a few ounces of rocks and dirt back to Earth. Early analysis shows the samples are the youngest bits of the Moon yet studied, at an age of about 1.7 billion years. [CSNA/Siyu Zhang/Kevin Gill]