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

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

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 ...

The fossil, Palaeocampa anthrax, was first described in 1865. Since then, it shifted labels—from worm to millipede to marine ...