A boy undergoing an eye test in the Salia Sahi slum area of Bhubaneswar, India. (Niharika Kulkarni/AFP/Getty Images) The ...

The concept of biological age, distinct from chronological age, is gaining public traction, though often misinterpreted.

When it comes to fertility, the focus tends to fall on women and their (loudly ticking) biological clocks. Yet it’s not just women who have to take age into account when considering when to have ...

In April of this year, Spanish athlete Beatriz Flamini emerged into the light after a 500-day stay in a cave. Her descent underground is probably the longest undertaken by a long stretch. Flamini says ...

As sunlight filters through your window each morning, a quiet, powerful rhythm pulses inside your body. This inner clock tells you when to sleep, eat, and wake. It keeps pace with the 24-hour cycle of ...

Better understanding Alzheimer's disease's effects on the biological clock could also have implications for preventing the disease. Poor sleep quality in adulthood is a risk factor for Alzheimer's, as ...

Morning-blooming morning glories and flowers that release fragrance at night seem as if they know the time. A KAIST research team has uncovered, at the molecular level, the workings of a "biological ...

Women in many times and places have felt pressure to bear children. But the idea of the “biological clock” is a particularly malevolent invention aimed to pressure women to have a child. In her ...

In cold-blooded vertebrates, deep-brain photoreceptors allow for photoentrainment, the process by which the eyes facilitate setting of the circadian clock. Mammals do not have these receptors; instead ...

If you were left in the dark, your body clock would become out of step with the 24-hour clock. There are sensors in your eyes ...