Scientists in Britain have discovered a new global warming threat to marine life in Antarctica -- breakaway icebergs that destroy any life in their path. Shallow habitats of species such as giant sea spiders, Antarctic worms, sea urchins and corals face growing risk from icebergs as they tear up the sea floor, The Times of London reported Friday. The findings indicate climate change risks go beyond rising ocean temperatures, the British Antarctic Survey team said. Although near-shore ecosystems routinely take a pounding by icebergs, the destruction rate is rising as a warmer climate shrinks the winter sea ice that otherwise...