The North Pole moves as ice sheets melt

By Becky OskinLiveScience The North Pole's surprise trip toward Greenland is due to Earth's rapidly melting ice sheets, a new study finds.The distribution of mass across the planet determines the position of Earth's poles. Because Earth is a bit egg-shaped, the North Pole is always slightly off-center. It's also been slowly drifting south, responding to long-term changes since the last Ice Age, as...