Across the country, lost-and-found networks seek to reunite objects with disaster survivors. The work can take years. In some cases, it's impossible to pick up all the pieces.

The U.S. has tapped into its strategic oil reserve to help drive down rising gasoline prices in the wake of the war with Iran. Can oil from Venezuela help fill it back up?

Commercial oyster farmers now send samples of their products to state regulators every week during the selling season so they can test for toxins that cause paralytic shellfish poisoning.

Southwestern Mexico braced for heavy rain and mudslides after Polo became a major hurricane. Forecasters warned another system headed for Hawaii could cause catastrophic flooding later in the week.

Glacial floods are increasingly dangerous around the world.

Indigenous communities around the world are using traditional knowledge to respond to floods, fires and drought.

In Juneau this summer, a dozen bears were feasting on a landfill in the city. Another bear crawled into a hotel via the window.

Building dams and hydropower plants in the Himalayas holds great promise for providing electricity. In the wake of the Nepal disaster, experts are asking about the risks of such construction.

Coral reefs are under threat right now due to abnormally warm ocean temperatures. Scientists are studying the healthiest reefs in the world in search of ways to help all reefs with climate change.

Hurricane Polo has grown into one of the most powerful Pacific cyclones in decades, and it was expected to skirt Mexico's southwestern coast as a Category 5 storm.