Continental drift is created at spreading centers, and this, along with subduction, drives the system of plates in a chaotic manner, resulting in continuous orogeny and areas of isostatic imbalance. The theory of plate tectonics explains all this, including the movement of the continents, better than Wegener's theory. Hans Stille and Leopold Kober opposed the idea of continental drift and worked on a "fixist" geosyncline model with Earth contraction playing a key role in the formation of orogens. Other geologists who opposed continental drift were Bailey Willis, Charles Schuchert, Rollin Chamberlin and Walther Bucher. In 1939 an international geological conference was held
Ice Age: Continental Drift second part, Scrat's underwater pursuit of acorns leads him to a pirate ship. The film was featured on Tommy Baldwin Racing's No. 10 car driven by Tomy Drissi for the 2012 NASCAR Sprint Cup Series Toyota/Save Mart 350 held on June 24, 2012. "Ice Age: Continental Drift" was released on DVD, Blu-ray, and Blu-ray 3D on December 11, 2012. "Ice Age: Continental Drift" earned $161,321,843 in North America, and $715,922,939 in other territories, for a worldwide total of $877,244,782. Its worldwide opening weekend totaled $126.9 million. Worldwide, it is the 47th-highest-grossing film of all time, the fifth-highest-grossing film of 2012