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After Mastodons and Mammoths, a Transformed Landscape
Roughly 15,000 years ago, at
the end of the last ice age,
North America's vast
assemblage of large animals
-- including such iconic
creatures as mammoths,
... > full story
Sustainable Farming May Help Maintain Healthy Climate
Sustainable farming,
initially adopted to
preserve soil quality for
future generations, may also
play a role in maintaining a
healthy climate, according
... > full story
Paleontologists Find Extinction Rates Higher in Open-Ocean Settings During Mass Extinctions
Researchers have uncovered a
strikingly pattern for
ancient mass extinctions:
extinctions rates during
mass extinctions were
... > full story
Oceans' Uptake of Human-Made Carbon May Be Slowing
The oceans play a key role
in regulating climate,
absorbing more than a
quarter of the carbon
dioxide that humans put into
the air. Now, the first
... > full story
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Origin of Life: Generating RNA Molecules in Water
November 20, 2009 — A key question in the origin of biological molecules like RNA and DNA is how they first came together billions of years ago from simple precursors. Now, researchers have reconstructed one of the ... > full story -
Mysteriously Warm Times in Antarctica
November 19, 2009 — A new study of Antarctica's past climate reveals that temperatures during the warm periods between ice ages (interglacials) may have been higher than previously thought. The latest analysis of ice ... > full story -
How Plant Stem Cells Guard Against Genetic Damage
November 18, 2009 — Scientists have shown how plants can protect themselves against genetic damage caused by environmental stresses. The growing tips of plant roots and shoots have an in-built mechanism that, if it ... > full story -
Diatoms Reveal Climate Changes
November 18, 2009 — Some 500 years ago there was a change in the circulation in the atmosphere over Scandinavia. This probably led to increased amounts of winter precipitation in northern Sweden for a ... > full story -
Dozen Lesser-Known Chemicals Have Strong Impact on Climate Change
November 18, 2009 — A new study indicates that major chemicals most often cited as leading causes of climate change, such as carbon dioxide and methane, are outclassed in their warming potential by compounds receiving ... > full story -
Monsoon Model Indicates Potential for Abrupt Transitions
November 18, 2009 — A self-amplifying effect presently sustains monsoon winds, but it could also disrupt the circulation over land and sea. The periodical rainfall could stop from one season to another or for months ... > full story -
Research Challenges for Understanding Landscape Changes Identified
November 18, 2009 — Nine research challenges and four research initiatives that are poised to advance the study of how Earth's landscapes change were unveiled by the National Research ... > full story -
Fossil Fuel Carbon Dioxide Emissions Up by 29 Percent Since 2000
November 17, 2009 — The strongest evidence yet that the rise in atmospheric carbon dioxide emissions continues to outstrip the ability of the world's natural "sinks" to absorb carbon has just been ... > full story -
New Water Management Tool May Help Ease Effects of Drought
November 17, 2009 — Continued improvement of climate forecasts is resulting in better information about what rainfall may look like months in advance. A researcher has now developed an innovative water management ... > full story -
How Much Water Does the Ocean Have?
November 17, 2009 — The calculation of variations in the sea level is relatively simple. It is by far more complicated to then determine the change in the water mass. A team of geodesists and oceanographers have now, ... > full story
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