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.

One in five Michiganians was over the age of 65 last year, according to new census data. Meanwhile, Metro Detroit gained ...

Scientists have found the oldest known evidence of the plague, which sparked deadly outbreaks dating back about 5,500 years ago — some 200 years ...