Rural communities in developing countries often have trouble securing dependable supplies of en... [查看全文]

American scientists have reported a sharp increase in the number of dead whales found in the Gulf of Alaska. Fr... [查看全文]

A group of scientists announced Thursday what they say is the discovery of remains from an early ancestor of hu... [查看全文]

Much of the western United States is suffering from extreme drought conditions. U.S. officials are blaming the la... [查看全文]

Environmentalists in Zimbabwe are concerned about the building of shopping malls and housing on wetlands. They say... [查看全文]

Most of us rarely think about the earth's magnetic field. We might know that it helps guide birds as they ... [查看全文]

Entomologists -- scientists who study insects -- are working with other scientists to learn w... [查看全文]

Experts say ground-based radar is unable to track more than 70% of aircraft flights. But that has continued to ... [查看全文]

In the United States, a company is working on a project that could change the way we think... [查看全文]

Earth is in the middle of its sixth mass extinction. The last such event took place 66 million years ago, when... [查看全文]