New Scientist: US scientists have figured out how icebergs break off Antarctica and Greenland, a finding that may help predict rising sea levels as the climate warms. Icebergs form fastest when parent ice sheets quickly spread out over the sea, the scientists say. It’s too late to help the Titanic, but this newly derived, simple law may help researchers improve their climate models and predict ice sheet break-up, they say. Other factors, such as ice thickness, width of the ice flow, …