And, I'm happy to report, it is biological aging that we have the potential to slow.

A common problem for the elderly is the question of when a medical condition or biological aging presents a serious enough problem that one should stop driving.

It involves interdisciplinary research on biological aging's causes, effects, and mechanisms.

Bey could rule out the idea of suicide-it always resulted in death without any physical change except biological aging.

"The fact it's so similar around the world suggests it's due to biological aging," she said.

It is most commonly due to biological aging but there are a wide variety of other causes.

By extremely wide margin, the largest unifying cause of death in the developed world is biological aging, leading to various complications known as aging-associated diseases.

The science of biological aging is biogerontology.

Thus, we speak of the "twin paradox", involving biological aging.

"If I am right, we would cease to experience biological aging," Walker said.