"This year's frenzy of oil and gas exploration in newly accessible Arctic waters could be the harbinger of even starker changes to come. If, as many scientists predict, currently inaccessible sea lanes across the top of the world become navigable in the coming decades, they could redraw global trading routes -- and perhaps geopolitics -- forever."

"Federal agents interviewed new witnesses this week in an ongoing investigation of government scientists that's been called 'polar bear-gate,' according to the scientists' lawyer."

"The controversial probe, now entering its third year, is looking into allegations of scientific misconduct related to a 2006 report by wildlife researchers Charles Monnett and Jeffrey Gleason, who described seeing dead polar bears floating in Arctic waters.

"The dramatic temperature increases that thawed the last ice age followed spikes in carbon dioxide levels in the air, a new study finds. Researchers say that further strengthens the scientific case explaining current man-made global warming."

Scientists say aerosols -- which encourage the formation of clouds, which in turn cool the earth -- may be changing ocean currents in ways that promote climate change.

"BANGKOK -- A floating mosque and golf course for the submerging Maldives islands. Amphibious homes in the Netherlands lifted to safety as waters surge beneath them. A hospital perched on 400 stilts to protect patients from Thailand's devastating floods and the encroaching sea."

"DUJIADUN, China -- Liu Changxiong has been farming in this southwestern Chinese village for more than a decade, but his years of experience aren't of much use these days."

"Darren Collins doesn't know life without Lyme disease. He was just 11 months old when he came home from Wisconsin's Mauthe Lake Campground pasty white, lethargic and running a fever of 105. Darren's flu-like illness eventually subsided, but a host of other troubling Lyme-related symptoms -- stomachaches, irritability and concentration problems -- have since plagued the boy, now 10."