Five decades ago, a landmark paper in Science titled The Cave Environment heralded
caves as ideal natural experimental laboratories in which to develop and address general …

Circadian rhythms influence most of our life activities, notably getting up and going to sleep
every day. The new edition of this book delves into the mechanisms surrounding how these …

Abstract In 1976, Pittendrigh and Daan established a theoretical framework which has
coordinated research on circadian clock entrainment and photoperiodism until today. The …

Living organisms anticipate the seasons by tracking the proportion of light and darkness
hours within a day—photoperiod. The limits of photoperiod measurement can be …

Several rodent species that are diurnal in the field become nocturnal in the lab. It has been
suggested that the use of running-wheels in the lab might contribute to this timing switch …

The tuco-tuco Ctenomys aff. knighti is a subterranean rodent which inhabits a semi-arid area
in Northwestern Argentina. Although they live in underground burrows where environmental …

While most studies of the impacts of climate change have investigated shifts in the spatial
distribution of organisms, temporal shifts in the time of activity is another important …

Synchronization of biological rhythms to the 24-hour day/night has long been studied with
model organisms, under artificial light/dark cycles in the laboratory. The commonly used …

Most self-sustained oscillations in biological systems and in technical applications are
based on a feedback loop, and it is usually important to know how they will react when an …

Photoperiodism plays an important role in the synchronization of seasonal phenomena in
various organisms. In mammals, photoperiod encoding is mediated by differential …