Biologists group animals with similar traits into broad categories called orders. Despite their similarities, animal species in the same order can have very different average lifespans. One of the ...

The latest Census Bureau figures reveal changes that Pennsylvania officials, employers and communities are watching closely.

Falling birth rates reveal a deeper social problem: many people who want children feel blocked by economic, housing, gender, ...

New research from the University of St. Andrews has shown that higher extinction risk is associated with a higher frequency of decreasing local prevalence of species, in an analysis of one of the most ...