Researchers uncover how 12-hour biological rhythms operate in mammals, exploring their unique mechanisms and potential ...

Anyway, as near as I can tell, the 12-hour clock goes way back to ancient Mesopotamia and Egypt. The Egyptians used a 12-hour sundial to tell time during the daytime and a 12-hour water clock at ...

In addition to 24-hour clocks, mammals and other organisms have 12-hour clocks that are autonomous, work independently from 24-hour clocks and can be modified by external factors. Some bodily ...

a research team at Baylor College of Medicine reveals a novel component of the 12-hour clock – the steroid receptor coactivator 3 (SRC-3) – showing that it is key in regulating this clock. The ...

An analogue clock, a clock with hands, shows the numbers 1 through to 12. It is a 12-hour clock. The first 12 hours of the day, from midnight to midday, are called am. The next 12 hours ...

O’Malley’s team also found that a 12-hour clock, distinct from the 24-hour circadian clock, drives this morning-evening rhythm in gene expression. The clock’s origin, the scientists suggest, may be ...