HOUSTON – The human internal clock fails to adapt to non-24-hour days and that fact takes its toll on astronauts, international travelers and shift workers. “Due to the shuttle orbit, astronauts often ...

Disruptions to our circadian clocks—the internal molecular timekeepers "ticking" in nearly every cell of our body throughout ...

Vision is a complex process. The visual perception of the environment is created by a combination of different wavelengths of light, which are decoded as colors and brightness in the brain.

A new research paper finds that genetic material from Neanderthal ancestors may have contributed to the propensity of some people today to be "early risers," the sort of people who are more ...

The findings appear in the January 23rd issue of Current Biology and are reported by Till Roenneberg of Ludwig-Maximilians-Universität, Germany; C. Jairaj Kumar, of Kasturba Medical College, India; ...

The circadian clock is an endogenous time-keeping system that is ubiquitous in animals and plants as well as some bacteria. In mammals, the clock regulates the sleep–wake cycle via 2 basic ...