Dr. Charles A. Czeisler's team has been studying sleep patterns and circadian rhythms in volunteers at the Brigham and Women's Hospital in Boston.

For quite a long time, the great majority of specialists who studied biological rhythms accepted this explanation.

Now that real-time, long-term methods are available to study molecular rhythms in mammalian tissues as well as in microbes, plants, and insects, methods such as ours will facilitate studies in a widening array of organisms.

He traveled through India extensively in the early '60s and '70s, then spent many years in Africa studying tribal rhythms.

Rein brought Aschoff to the Institute as a collaborator to study circadian rhythms in humans, birds, and mice.

The Andechs bunker was used to study human circadian rhythms under a range of conditions, including visual blindness and depression.

When Menaker joined faculty at University of Texas, Austin in 1962, he transitioned to studying circadian rhythms in the house sparrow (Passer domesticus) and the golden hamster (Mesocricetus auratus).

As he plays, it is clear to Ms. Oppens that the young pianist, tackling his first Carter work, has studied its notes, rhythms and structure quite carefully.

Acetabularia has been used to study circadian rhythms.

UCSF neurologist Louis Ptacek, who studies circadian rhythms, genes and sleep behaviors, has been quoted: "It's not surprising, we have evolved on a planet that is rotating every 24 hours.