If you look up at the Moon this Thursday through binoculars or a small telescope, you may be able to see an unusual feature; a giant ... X does not leap out all at once but gradually appears over ...

But stargazers in the UK and the US will be able to see a giant X on the moon ... the terminator line passes over the intersection of those four craters and the X appears to glow brightly.

Ian Randall is Newsweek's Deputy Science Editor, based in Royston, U.K. His focus is reporting on science and health. He has covered archeology, geology, and physics extensively. Ian joined ...