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.

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

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

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

In a new study published in Communications Biology, a team of researchers redescribe Palaeocampa anthrax as the first known nonmarine lobopodian, and the youngest ever discovered. The fossil, which ...