Drilling diagram of lake Vostok.
A while back, one of the lakes under the ice of the South Pole was finally reached by a team of Russian scientists. This lake is known as Lake Vostok, the lake isolated from the outside world for 17 million years. The researchers have now announced that they have identified a new form of bacterial life from the depths of this mysterious world. At best, the DNA of this bacteria is only an 86% match to any other form of life, indicating it as a new species.
More research is needed to make sure that this bacteria really is a new species, but until then, I recommend reading this article.