French researchers have discovered the largest virus ever seen on Earth. Dubbed the Pandoravirus, after the myth of Pandora's box, it measures 1,000 times bigger than the common flu virus by volume. The massive virus was found in sediment off the coast of Chile and in a pond near Melbourne, Australia, and is so bizarre that researchers think it may have originated from another planet. It is not considered a health risk to humans. More at Mail Online.