More on How Microbes Make Earth Habitable

Last week we discussed how microbes maintain the viability of life on our planet ("How Microbes Make Earth Habitable"). In the same vein, more news just arrived about the carbon and nitrogen cycles.

Following up on MIT's findings about plankton taking carbon to the ocean bottom, Ohio State has just concluded from the three-year Tara Oceans oceanography expedition that plankton -- and some viruses -- are "key to carrying carbon" from the atmosphere down to the seafloor sediments. They took pi...