For their part, scientists haven't had a very hard time finding those giant viruses. From a single sample of Siberian permafrost, they've managed to come up with two so far. The first of those, Pithovirus sibericum, was discovered/isolated last year, while the most recent find, Mollivirus sibericum, is described in a study published this week in the Proceedings of the National Academy of Sciences. Both are examples of rare giant viruses, e.g. those easily visible using optical microscopes Read More?at www.motherboard.vice.com