Humans and most other organisms have internal biological clocks that track the daily cycle of sunrise and sunset. These ...

The researchers also found that the clock usually peaks in activity during the early night, similar to the mother’s rhythm.

A new hair-based test offers a surprisingly simple way to peer into the body’s internal clock. A team at Charité – Universitätsmedizin Berlin has developed a new way to read the body’s internal clock ...

When does the circadian clock start ticking? A new study shows that fetal clocks synchronize to the mother in the womb via hormones, highlighting the importance of light and sleep during pregnancy.