Many men lose their Y chromosomes as they age. It may shorten their lives.

A 3D illustration of two chromosomes, with the larger X chromosome on the left with its four ends dipped in yellow to show the telomeres, while the shorter Y chromosome is to the right. A researcher explores why men lose their Y chromosomes in cells as they age and the health implications associated with this loss.

A researcher explores why men lose their Y chromosomes in cells as they age and the health implications associated with this loss.