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Researchers Study Cave's 'Breathing' for Better Climate Clues

(PhysOrg.com) -- A University of Arkansas researcher studying the way caves "breathe" is providing new insights into the process by which scientists study paleoclimates.

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Global monsoon drives long-term carbon cycles in the ocean

Monsoon is a global system, and many arrays of evidence indicate that it drives long-term cyclicity of the carbon reservoir in the global ocean. The new view is introduced in a substantial paper in...

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Early hominid first walked on two legs in the woods

Among the many surprises associated with the discovery of the oldest known, nearly complete skeleton of a hominid is the finding that this species took its first steps toward bipedalism not on the...

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Supervolcano eruption -- in Sumatra -- deforested India 73,000 years ago

A new study provides "incontrovertible evidence" that the volcanic super-eruption of Toba on the island of Sumatra about 73,000 years ago deforested much of central India, some 3,000 miles from the...

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Giant fossil Prototaxites: Unraveling a 400-million-year-old mystery

Contradictions and puzzles surround the giant fossil Prototaxites. The fossils resemble tree trunks, and yet they are from a time before trees existed. The stable carbon isotope values are similar to...

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Stalagmite reveals carbon footprint of early Native Americans

A new study led by Ohio University scientists suggests that early Native Americans left a bigger carbon footprint than previously thought, providing more evidence that humans impacted global climate...

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Scientists link ocean acidification to prehistoric mass extinction

(PhysOrg.com) -- New evidence gleaned by analyzing calcium embedded in Chinese limestone suggests that volcanoes, which spewed massive amounts of carbon dioxide into the atmosphere for a million years,...

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Ancient leaves help researchers understand future climate

Potential climate change caused by rising levels of carbon dioxide might be better understood by examining fossil plant remains from millions of years ago, according to biogeochemists. The types of...

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Research reveals how monarchs fly away home

Monarch butterflies -- renowned for their lengthy annual migration to and from Mexico -- complete an even more spectacular journey home than previously thought.

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Fossil record receives new timeline

Beginning around 542 million years ago, a profusion of animals with shells and skeletons began to appear in the fossil record. So many life forms appeared during this time that it is often referred to...

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Paper archives reveal pollution's history

A new source of climate records is as close as the nearest university library: Back issues of magazines reveal the rise in atmospheric CO2 from burning fossil fuels.

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New study illustrates shifting biomes in Alaska

A new study released today in the EarlyView of Ecology Letters addresses forest productivity trends in Alaska, highlighting a shift in biomes caused by a warming climate. The findings, conducted by...

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Discovering lost salmon at sea

Where Atlantic salmon feed in the ocean has been a long-standing mystery, but new research led by the University of Southampton shows that marine location can be recovered from the chemistry of fish...

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Rock sleuths: Researchers seek clues to atmospheric changes ahead of animal life

For more than a decade, scientists have dismissed claims that examining carbon-rich rocks could yield clues to the atmospheric and oceanic conditions on Earth hundreds of millions of years ago, but now...

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In tree rings, Japanese scientists find 8th-century mystery

In the late eighth century, Earth was hit by a mystery blast of cosmic rays, according to a Japanese study that found a relic of the powerful event in cedar trees.

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Ancient human ancestor Australopithecus sediba had unique diet: study

When it came to eating, an upright, 2-million-year-old African hominid had a diet unlike virtually all other known human ancestors, says a study led by the Max Planck Institute of Evolutionary...

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Red Crucifix sighting in 774 may have been supernova

(Phys.org) -- A supernova may have actually been the mysterious "Red Crucifix" in the sky that is cited in the Anglo Saxon Chronicle for the year 774. New correspondence between a university student...

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Geochemical analysis of Chinese rocks used to better understand the...

(Phys.org)—University of Cincinnati professor Thomas J. Algeo, working with a team of Chinese scientists, has established a tight link between repeated episodes of volcanic activity and environmental...

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Oxygen's ups and downs in the early atmosphere and ocean

Most researchers imagine the initial oxygenation of the ocean and atmosphere to have been something like a staircase, but with steps only going up. The first step, so the story goes, occurred around...

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Carbon tracking and climate models: Researchers study carbon cycling in...

(Phys.org)—Using dogwood trees, scientists are gaining a better understanding of the role photosynthesis and respiration play in the atmospheric carbon dioxide cycle. Their findings will aid computer...

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