The U.S. Postal Service is turning 250. Saturday’s anniversary comes as the agency faces financial challenges.

It has grown from serving the 13 colonies to reaching nearly 169 million addresses and employing more than 635,000 people.

In a twist worthy of a detective novel, a long-misidentified fossil at Harvard's Museum of Comparative Zoology (MCZ) has ...

A century-old fossil long mislabeled as a caterpillar has been reidentified as the first-known nonmarine lobopodian—rewriting ...

Anthrax experts say they simply don't know what survivors like Wallace can expect in the future. Wallace says no one seems to be able to tell her when and if the symptoms will subside.

Anthrax might be more commonly thought of as a bioterrorist weapon, bringing to mind white envelopes and government buildings. But Wyoming officials warned residents on Wednesday that there’s an ...

Anthrax most commonly occurs in wild and domestic lower vertebrates (cattle, sheep, goats, camels, antelopes and other herbivores), but it can also occur in humans.

The anthrax attacks, coming on the heels of Sept. 11, had enduring effects. They deepened fears of terrorism and helped advocates of a U.S. invasion of Iraq make their case to Congress and the public.