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Drop in Carbon Dioxide Levels Led to Polar Ice Sheet, Study Finds
December 1, 2011 — A drop in carbon dioxide appears to be the driving force that led to the Antarctic ice sheet's formation, according to a recent study of molecules from ancient algae found in deep-sea core ... > full storyMore: -
Rise of Atmospheric Oxygen More Complicated Than Previously Thought
December 1, 2011 — The appearance of oxygen in the Earth's atmosphere probably did not occur as a single event, but as a long series of starts and stops, according to an international team of researchers who ... > full story -
Climate Sensitivity to Carbon Dioxide More Limited Than Extreme Projections, Research Shows
November 24, 2011 — The rate of global warming from doubling of atmospheric carbon dioxide may be less than the most dire estimates of some previous studies -- and, in fact, may be less severe than projected by the ... > full story -
Date and Rate of Earth's Most Extreme Extinction Pinpointed: Results Stem from Largest Ever Examination of Fossil Marine Species
November 17, 2011 — Through the analysis of various types of dating techniques on well-preserved sedimentary sections from South China to Tibet, researchers determined that the mass extinction peaked about 252.28 ... > full story -
Massive Volcanoes, Meteorite Impacts Delivered One-Two Death Punch to Dinosaurs
November 17, 2011 — A cosmic one-two punch of colossal volcanic eruptions and meteorite strikes likely caused the mass-extinction event at the end of the Cretaceous period that is famous for killing the dinosaurs 65 ... > full story -
Ancient Bronze Artifact from East Asia Unearthed at Alaska Archaeology Site
November 14, 2011 — Archeologists have discovered the first prehistoric bronze artifact made from a cast ever found in Alaska, a small, buckle-like object found in an ancient Eskimo dwelling and which likely originated ... > full story -
Methane May Be Answer to 56-Million-Year Question: Ocean Could Have Contained Enough Methane to Cause Drastic Climate Change
November 9, 2011 — The release of massive amounts of carbon from methane hydrate frozen under the seafloor 56 million years ago has been linked to the greatest change in global climate since a dinosaur-killing asteroid ... > full story -
Ice Age Paintings from the Swabian Jura, Southwestern Germany Document the Earliest Painting Tradition in Central Europe
November 8, 2011 — Recent excavations conducted by the University of Tübingen at Hohle Fels Cave in the Swabian Jura of southwestern Germany have produced new evidence for the earliest painting tradition in ... > full story -
Scientists Find Evidence of Ancient Megadrought in Southwestern U.S.
November 6, 2011 — A new study has revealed a previously unknown multi-decade drought period in the second century A.D. The findings give evidence that extended periods of aridity have occurred at intervals throughout ... > full story -
Humans and Climate Contributed to Extinctions of Large Ice Age Mammals, New Study Finds
November 2, 2011 — Both climate change and humans were responsible for the extinction of some large mammals, according to research that is the first of its kind to use genetic, archeological, and climatic data together ... > full storyMore:
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