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| Boldly illuminating biology's 'dark matter' Posted: 14 Jul 2013 01:08 PM PDT Microbial dark matter comprises the invisible infrastructure of life that can have profound influences on the most significant environmental processes. By employing next generation DNA sequencing of single cell genomes, researchers are systematically filling in the bacterial and archaeal tree of life's uncharted branches.  |
| Some volcanoes 'scream' at ever-higher pitches until they blow their tops Posted: 14 Jul 2013 01:05 PM PDT Swarms of small earthquakes can precede a volcanic eruption, sometimes resulting in "harmonic tremor" resembling sound from some musical instruments. A new analysis shows tremor during a 2009 sequence at Alaska's Redoubt Volcano glided to substantially higher frequencies, then stopped abruptly just before six of the eruptions.  |
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