Something strange has happened on Ganymede, this solar system’s largest moon. Orbiting Jupiter, planetary experts discovered it has a large icy bulge.
“We were basically very surprised,” said William McKinnon, a professor in Washington University's Earth and Planetary Sciences Department. “It’s like looking at old art or an old sculpture. We looked at old images of Ganymede taken by the Voyager spacecraft in the 1970s that had been completely overlooked, an enormous ice plateau, hundreds of miles across and a couple miles high.”