Scientists captured this striking image of the Apollo 15 landing site by shooting a powerful radar signal from Earth into space and bouncing it off the lunar surface. The thin, meandering channel running through the middle of the image is the Hadley Rille, a scar left on the moon after past volcanic activity, likely a collapsing lava tube, according to a statement from the National Radio Astronomy Observatory (NRAO). The circular dent pictured near the rille is Hadley C, a crater about 3.7 miles (6 kilometers) in diameter. Scientists spent two years developing the technology to take these detailed images...