What drives circadian rhythms in the polar regions?

In temperate latitudes, the right timing is crucial for almost all living things: Plants sprout with the advent of spring, bees know the best times to visit flowers, people get tired in the evening and wake up again in the ...

Scientists discover skin keeps time independent of the brain

Squids, octopuses, cuttlefish, amphibians, and chameleon lizards are among the animals that can change the color of their skin in a blink of an eye. They have photoreceptors in their skin that operate independently of their ...

A timekeeper for siesta

Circadian clocks must be flexible and they must be able to adapt to varying environmental conditions. Otherwise, it would be impossible for living beings to change their patterns of activity when the days get shorter again ...

Bumble bee workers sleep less while caring for young

All animals, including insects, need their sleep. Or do they? That's the question researchers reporting October 3 in the journal Current Biology are exploring in sleep studies of a surprising group of subjects: brood-tending ...

Study gives the green light to the fruit fly's color preference

For more than a century, the humble and ubiquitous fruit fly has helped scientists shed light on human genetics, disease, and behavior. Now a new study by University of Miami researchers reveals that the tiny, winged insects ...

The role of GABA neurons in the central circadian clock

The research team led by Dr. Daisuke Ono and Prof. Akihiro Yamanaka of the Graduate School of Medicine, Nagoya University, along with collaborators, has revealed that inhibitory neurons (GABAergic neurons) of the central ...

Researchers show evidence of cellular clocks in cells

One of nature's most familiar phenomena is collective behavior—fish swimming in schools, locusts marching together, birds flocking. The same thing happens in humans, with individual cells synchronizing into circadian rhythms, ...

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