National (U.S.)

"Scientists in the Arctic are reporting a rare mass migration of thousands of walrus from the ice floes to dry land along Alaska's coast."

The House Science Committee on Thursday holds a hearing to probe what went wrong thirteen years ago when a federal report whitewashed the health threats to Marines and their families from contaminated water at the Camp Lejeune, N.C., base.

"Swimming in a chlorinated pool may increase your risk of developing cancer, suggest a new suite of studies, which identified more than 100 chemical byproducts in pools that use chlorine as a disinfectant."

Pouty green fashionistas stalk the runways as Fashion Week takes over Gotham. Ten top designers show that eco-friendly, ethically sound, fair-trade fashion does not have to be matronly. It's all about recycled glitz. But are recycled soda tabs wearable?

A 30-inch natural gas pipeline routed through a densely populated area in San Bruno, Calif., exploded Thursday, killing at least 7 people. The fireball rose some 1,000 feet in the air and destroyed dozens of homes.

"Scientists on a research vessel in the Gulf of Mexico are finding a substantial layer of oily sediment stretching for dozens of miles in all directions. Their discovery suggests that a lot of oil from the Deepwater Horizon didn't simply evaporate or dissipate into the water — it has settled to the seafloor."

"Bill McKibben, an environmental campaigner from Vermont with a flair for showmanship, was rebuffed Friday morning in his effort to get the White House to reinstall one of the solar panels that President Jimmy Carter had placed on the White House roof."

"A plan to ship 16 steam generators on the Detroit River and Great Lakes has sparked an international outcry. What alarms residents on the U.S. and Canadian sides of the waterways is the material inside the generators -- nuclear waste."

"The first wave of mass-produced advanced batteries funded by the Obama administration's economic recovery program is starting to roll off assembly lines, setting the stage for new hybrid and electric vehicles."

"Candidates are lining up behind the issue of gas drilling as the controversial method called hydrofracking takes center stage this election season in the Finger Lakes region."