Came from an underwater volcano. The New Zealand Navy announced today that they have found a patch of floating volcanic pumice from an underwater volcano floating about 600 miles off the shore of New Zealand. “The rock looked to be sitting two foot (half a meter) above the surface of the waves and lit up a brilliant while colour in the spotlight. It looked exactly like the edge of an ice shelf,” said Lieutenant Tim Oscar aboard the ship the HMNZS Canterbury.Scientists aboard the ship said the white pumice – which covers 10,000 square miles ( 26,000 sq km) –...