schwit1 quotes a report from The Sun: Scientists believe a massive object which could change our understanding of history is hidden beneath the Antarctic ice. The huge and mysterious "anomaly" is thought to be lurking beneath the frozen wastes of an area called Wilkes Land. It stretches for a distance of 151 miles across and has a maximum depth of about 848 meters. Some researchers believe it is the remains of a truly massive asteroid which was more than twice the size of the Chicxulub space rock which wiped out the dinosaurs. If this explanation is true, it could mean this killer asteroid caused the Permian-Triassic extinction event which killed 96 percent of Earth's sea creatures and up to 70 percent of the vertebrate organisms living on land.This "Wilkes Land gravity anomaly" was first uncovered in 2006, when NASA satellites spotted gravitational changes which indicated the presence of a huge object sitting in the middle of a 300 mile wide impact crater.