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Evolution and the Ice Age
February 26, 2013 — Scientists are discovering how the evolution of ecosystems has to be taken into account when speculating between different geological eras. Go back to the time of the dinosaurs or to the ... > full story -
Tree-Ring Data Show History, Pattern to Droughts
February 17, 2013 — Researchers used more than 1,400 climate-sensitive tree-ring chronologies from multiple tree species across North America to reconstruct the Palmer drought severity index (PDSI), a widely used soil ... > full story -
Ice Age Extinction Shaped Australian Plant Diversity
February 13, 2013 — Researchers have shown that part of Australia's rich plant diversity was wiped out by the ice ages, demonstrating that extinction, probably more than evolution, influences ... > full story -
Isotope Patterns in Ancient Volcanic Sulfur Tell Which Global Cooling Episodes Were Caused by Volcanic Eruptions
February 11, 2013 — Volcanoes are well known for cooling the climate. But just how much and when has been a bone of contention among historians, glaciologists and archeologists. Now a team of atmosphere chemists has ... > full story -
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
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