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AUSTIN, Texas — Thor, the legendary Norse god from the mythological city of Asgard, is not alone. According to groundbreaking research published in the

 E-Mail IMAGE: Tengchong Yunnan hot springs in China, where some of the newly described Brockarchaeota were collected. view more  Credit: Jian-Yu Jiao/Sun Yat-Sen University The tree of life just got a little bigger: A team of scientists from the U.S. and China has identified an entirely new group of microbes quietly living in hot springs, geothermal systems and hydrothermal sediments around the world. The microbes appear to be playing an important role in the global carbon cycle by helping break down decaying plants without producing the greenhouse gas methane. "Climate scientists ...

 E-Mail From the perspective of A. Murat Eren, PhD, the mouth is the perfect place to study microbial communities. "Not only is it the beginning of the GI tract, but it's also a very special and small environment that's microbially diverse enough that we can really start to answer interesting questions about microbiomes and their evolution," said Eren, an assistant professor in the Department of Medicine at the University of Chicago. "There's a surprising amount of site specificity, in that you find defined patterns of microbes in different areas of the mouth -- the microbes associated with...