Guardian: Global warming is changing the way the Earth wobbles on its polar axis, a new Nasa study has found.
Melting ice sheets, especially in Greenland, are changing the distribution of weight on Earth. And that has caused both the North Pole and the wobble, which is called polar motion, to change course, according to a study published on Friday in the journal Science Advances.
Scientists and navigators have been accurately measuring the true pole and polar motion since 1899, and for almost the entire...