Bloomberg: The blue whale, the largest animal on Earth, may be saved from extinction with help from an ocean- fertilization experiment in the seas off Antarctica that has sparked growth of its main food source. Dumping a by-product of metal processing, iron sulfate, into the ocean stimulates the growth of plankton, which is consumed by krill, said Victor Smetacek of Germany’s Alfred Wegener Institute for Polar and Marine Research. Adult blue whales eat about 4 tons of the shrimp-like animal …