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Studying Ice Cores from West Antarctica for Clues as to Why the Earth Began to Emerge from the Ice Age
February 8, 2013 — Scientists made history this year by retrieving additional ice from the main borehole in West Antarctica. Researchers will now work on a section of ice from 17,500 years ago that offers clues as to ... > full story -
New Evidence Suggests Comet or Asteroid Impact Was Last Straw for Dinosaurs
February 7, 2013 — While many assume that a comet or asteroid impact killed off the dinosaurs, the actual dates of the impact and extinction are imprecise enough that some have questioned the connection. Scientists ... > full story -
Volcano Location: Greenhouse-Icehouse Key? Episodic Purging of 'Carbonate Capacitor' Drives Long-Term Climate Cycle
February 7, 2013 — A new study suggests that Earth's repeated flip-flopping between greenhouse and icehouse climates during the past 500 million years may have been caused by an episodic flare-up of volcanoes at key ... > full story -
Tropical Rainfall Patterns Varied Through Time: Deeper Understanding of Drought Cycles in Central America
February 4, 2013 — Historic lake sediment dug up by researchers reveals that oceanic influences on rainfall in Central America have varied over the last 2,000 years, highlighting the fluctuating influence the Atlantic ... > full story -
Vegetation Changes in Cradle of Humanity: Study Raises Questions About Impact on Human Evolution
January 31, 2013 — What came first: the bipedal human ancestor or the grassland encroaching on the forest? A new analysis of the past 12 million years' of vegetation change in the cradle of humanity is challenging ... > full story -
Low Extinction Rates Made California a Refuge for Diverse Plant Species
January 9, 2013 — The remarkable diversity of California's plant life is largely the result of low extinction rates over the past 45 million years, according to a new study. Although many new species have evolved in ... > full story -
Jurassic Ecosystems Were Similar to Modern: Animals Flourish Among Lush Plants
January 8, 2013 — In modern ecosystems, animals flourish amid lush vegetation. That was true 150 million years ago too, says a new study by paleontologists. They applied ecological principles to geochemical data from ... > full story -
Who Deforested Central Africa: Humans or Climate?
January 7, 2013 — It is a much debated question: why did Central African forests become partially fragmented between 2,500 and 2,000 years ago, leaving room for more open forest landscapes and savannah? Recently, ... > full story -
Coral Records Suggest El Nino Activity Rises Above Background
January 3, 2013 — By examining a set of fossil corals that are as much as 7,000 years old, scientists have dramatically expanded the amount of information available on the El Nino-Southern Oscillation, a Pacific Ocean ... > full story -
Fluctuating Environment May Have Driven Human Evolution
December 26, 2012 — A series of rapid environmental changes in East Africa roughly 2 million years ago may be responsible for driving human evolution, according to researchers at Penn State and Rutgers ... > full story
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