From biological clock to biological rhythms
The genetic and molecular analysis of circadian timekeeping mechanisms has accelerated as a result of the increasing volume of genomic markers and nucleotide sequence information.

A proposal for robust temperature compensation of circadian rhythms
The internal circadian rhythms of cells and organisms coordinate their physiological properties to the prevailing 24-h cycle of light and dark on earth.

When It Comes To Sleep Research, Fruit Flies And People Make Unlikely Bedfellows
You may never hear fruit flies snore, but rest assured that when you're asleep they are too.

Keeping The Body In Sync: The Stability Of Cellular Clocks
A study in Switzerland uses the tools of physics to show how our circadian clocks manage to keep accurate time in the noisy cellular environment.

How Your Body Clock Avoids Hitting The Snooze Button
Scientists from Queen Mary, University of London have discovered a new part of the mechanism which allows our bodyclocks to reset themselves on a molecular level.

Mood Lighting: Penn Researchers Determine Role Of Serotonin In Modulating Circadian Rhythm
Researchers have determined how serotonin decreases the body's sensitivity to light and that exposure to constant darkness leads to a decrease in serotonin levels in the brain of fruit flies.

New Fruit Fly Protein Illuminates Circadian Response To Light
Researchers at the University of Pennsylvania School of Medicine have identified a new protein required for the circadian response to light in fruit flies.

New Way Found To See Light Through Novel Protein Identified By Dartmouth Geneticists
Geneticists have discovered a new class of proteins that see light, revealing a previously unknown system for how light works.

Novel Connection Found Between Biological Clock And Cancer
Dartmouth Medical School geneticists have discovered that DNA damage resets the cellular circadian clock

The mouse Clock mutation reduces circadian pacemaker amplitude and enhances efficacy of resetting stimuli and phase–response curve amplitude
The increased efficacy of resetting stimuli and decreased PER expression amplitude can be explained in a unified manner by a model in which the Clock mutation reduces circadian pacemaker amplitude in the suprachiasmatic nuclei.

The circadian basis of winter depression
The findings support the phase-shift hypothesis for SAD, as well as suggest a way to assess the circadian component of other psychiatric, sleep, and chronobiologic disorders

Light-dark cycle synchronization of circadian rhythm in blind primates
In this study, the authors evaluated the photoresponsiveness of the circadian system of these blind marmosets.

Study: Length of children's sleep duration varies; can influence their weight, behavior
The duration of a child's sleep can vary, depending on the time of day, week and year

Studies find stable sleep patterns and regular routines may improve outcomes in bipolar disorder
Bipolar disorder, commonly known as manic-depressive disorder, is highly influenced by the circadian system - the body's internal clock

Altered sex hormone levels, higher body temp affects sleep quality in postmenopausal women
In an examination of potential relationships between objective sleep measures, nocturnal sex hormone levels, and the nocturnal course of body temperature of older postmenopausal women

Key Found To Moonlight Romance
An international team of Australian and Israeli researchers has discovered what could be the aphrodisiac for the biggest moonlight sex event on Earth.

Feeling sleepy is all in your genes
Genes responsible for our 24 hour body clock influence not only the timing of sleep, but also appear to be central to the actual restorative process of sleep

Study identifies pathway required for normal reproductive development
Gene defects cause infertility, lack of sense of smell in humans and mice

Simplest circadian clocks operate via orderly phosphate transfers
3 proteins in a test tube, fueled by ATP, maintain accurate circadian rhythm for weeks

Researchers propose new molecule to explain circadian clock
The internal clock in living beings that regulates sleeping and waking patterns -- usually called the circadian clock -- has often befuddled scientists due to its mysterious time delays.