<p><br /> British explorers have found the world's deepest undersea volcanic vents more than three miles under the sea.<br /> </p><p><br /> Scientists from the National Oceanography Centre in Southampton made the discovery in the Cayman Trough in the Caribbean using a remote-controlled robot submarine.<br /> </p><p><br /> They discovered slender spires made of copper and iron ores.<br /> </p><p><br /> The water being pumped out from of the so-called "black smokers" is hot enough to melt lead.<br /> </p><p><br /> The area is almost half a mile deeper than has ever been seen before and, with extremely high water pressure, it is tantamount to a "hell on Earth".<br /> </p><p><br /> The boiling water that gushes out from deep-sea vents helps to nourish colonies of marine creatures.<br /> </p>
