Wahingtonpost: The melting of Greenland and Antarctica is changing the Earth's rotation
Even as the Earth spins on its axis in a west to east direction, that axis itself is also moving
This means that the physical North and South poles are actually shifting every 24 hours
Researchers observed this using NASA's GRACE satellites, which measure gravitational change
An iceberg floats in the sea near Qeqertarsuaq, Disko Island, Greenland, on July 21, 2011. Global warming is shifting the way the Earth wobbles...