Policy
A new study suggests the ecosystem -- and others like it -- can't be relied upon to remove excess carbon from the atmosphere.
Researchers train dog detectives so their testimony is admissible in courts.
Two gangs flow ivory from the wild to Mombasa, and then to the market.
How can we wrap our minds around the truly wicked problem of climate change?
U.S. and Indian citizens don't see a need to wait for an international agreement to cut greenhouse gas emissions.
Physical scientists aren't trained for all the political and moral issues.
Experts say there are many misconceptions about synthetic cannabinoids.
Two new studies suggest rising populations for famous predators.
Return of one predator helps another find more food.
One group pays, both profit in computer model.
Is it possible to put a dollar value on the beauty of a river or to judge the worth of a wetland? Some conservationists think so.