Year in review: Pacific Plate slides over slick layer
Mantle might not drive movements after all
![ship ocean](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/12/122615_14_feat_0.png?fit=860%2C460&ssl=1)
SHAKY GROUND Researchers drag sensors across the ocean near New Zealand to study ocean floor vibrations, adding data to the debate about how the Earth moves deep underground.
NZP&M