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The real power of the biological tool lies in exploring how genomes work.

Birds and bees are just the beginning for a burgeoning technology.

We are accustomed to treating aging as a set of things that go wrong with the body. But for more than twenty years, there has been accumulating evidence that much of the process takes place under genetic control.

This could explain why obese people have lower mortality rates. For the first time, scientists have discovered a connection between a cell's fat content and its lifespan, which could explain the 'obesity paradox' that's been puzzling scientists for decades: why obese people have the lowest all-cause mortality rates, whereas the rate for those who are fit and lean is higher.

Biological measures of aging are important for understanding the health of an aging population, with epigenetics particularly promising. Previous studies found that tumor tissue is epigenetically older than its donors are chronologically.

A study on human cells reveals how cellular aging affects the 3-D architecture of chromosomes.