Featured blog: Users of brand-new buildings on a major university campus were surprised to discover high concentrations of lead in the water. Faucets were the culprit.

Engineers are homing in on germs and other surprises behind the development of tiny holes in home water pipes.

A widely used agricultural weed killer teams up with fertilizer to render frogs especially vulnerable to debilitating parasites. (p. 12)

Turning down the thermostat on a home's water heater could foster the growth of toxic bacteria in home plumbing.

America's ailing water-delivery infrastructure is literally throwing clean water away -- and dirtying some of what it moves toward our taps.

New techniques may be shaving a century or two off the recovery of mined mountain tops.

Forested mountain peaks have been giving way to grassy planes in Appalachian coal country.

Tales of the black band: Clues to a 4,200-year-old mystery lie frozen in icy records stored atop Mt. Kilimanjaro.

Even jet-lagged, the world's lead climate negotiator took time out to brief a few reporters.

This dusty library saves the geo-curious a trip to Antarctica.

Featured blog: As glaciers continue to dry up, so does any hope of gleaning information from them about the past climate record.

Featured blog: In the last debate, McCain denounced proposed federal spending on a multimillion dollar "overhead projector."