New research into the deep ocean floor yields promising results for microbiologists is a EurekAlert article. If there is a biological frontier where might that be? Beneath the floor of the ocean deep perhaps. A huge biological reservoir could be located there. Post-doctoral fellow at Aarhus University in Denmark and the University of Southern California, Beth Orcutt, is quoted as saying:
There may be new species of life and new types of metabolism that we haven't discovered yet. The seafloor and sub-seafloor are exciting environments where microbes rule. We have to develop sophisticated experiments to try to learn more about these microbial habitats, experiments which will reveal new information about how life survives and thrives on Earth and maybe about how life may exist on other planets.
Orcutt has good cause for enthusiasm. It sounds as if there are exciting times awaiting her but I'm dubious that much will be learned about life on other planets. Wouldn't it be more likely that if life arose somewhere else in the universe it would occur in conditions that are similar to non-extreme as opposed to extreme earthly conditions?