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- Scientists solve a 14,000-year-old ocean mystery
- Boldly illuminating biology's 'dark matter'
- Some volcanoes 'scream' at ever-higher pitches until they blow their tops
| Scientists solve a 14,000-year-old ocean mystery Posted: 14 Jul 2013 01:09 PM PDT At the end of the last Ice Age, as the world began to warm, a swath of the North Pacific Ocean came to life. During a brief pulse of biological productivity 14,000 years ago, this stretch of the sea teemed with phytoplankton, amoeba-like foraminifera and other tiny creatures, who thrived in large numbers until the productivity ended -- as mysteriously as it began -- just a few hundred years later. |
| 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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