Scientists discovered that a blood protein called NfL rises with age and may help predict lifespan in animals and humans.

A protein called neurofilament light chain (NfL)—studied in humans in the context of neurodegenerative diseases and aging—is ...

Are you thinking of adopting a pair of guinea pigs? Taking on a new pet is a huge commitment, and one of the first things we should consider is lifespan. So, how long do guinea pigs live? You’ll be ...

While pet dogs can be loved beyond words, does having them in our lives, only for a limited time, make them even more precious?