Years ago, it used to be standard practice for hospital nurses to leave bright lights on all the time in neonatal intensive care units because it helped the staff better attend to premature infants’ ...

If you need to stay awake all night, gradually retraining your internal clock for a week can be a big help. Frequent movement, bright lights, and caffeine can also help. Sometimes the dreaded ...

Researchers, however, believe circadian rhythms aren't exact, ranging from 23 to 25 hours. The people who run on the faster clock would be the morning people, and those whose clocks are slower would ...