Introduced species of animals, plants and microbes cost the U.S. $123 billion a year
The insect has spread, maiming animals and shifting the ecological balance
Saving the sick by flooding their lungs
Faster, cheaper ways to restore polluted ground are largely shunned
Satellite data reveal how lightning influences climate
"The area of below normal sea surface temperatures continues to expand in the central equatorial Pacific, marking the demise of the 1997/1998 El Ni¿o episode and the further evolution of La Ni¿a (Cold episode) conditions. If current trends continue, La Ni¿a conditions can be expected by late Northern Hemisphere summer to early fall."
Photonic crystals promise advances in communications and optical computers