
Biological Clocks Operate on Many Scales
Whether they're counting minutes, months or years, biological clocks help to keep our brains and bodies running on schedule
Karen Wright is an award-winning writer and editor based near Seattle. Her work has appeared in numerous national magazines and newspapers and has been syndicated worldwide.

Biological Clocks Operate on Many Scales
Whether they're counting minutes, months or years, biological clocks help to keep our brains and bodies running on schedule

Sleep Is the Brain's Way of Staying in Balance [Video]
The connections between neurons get weaker, not stronger, when we sleep—and that keeps brain cells from becoming overtaxed by waking events

Times Of Our Lives
Whether they're counting minutes, months or years, biological clocks help to keep our brains and bodies running on schedule

Times of Our Lives
Whether they're counting minutes or years, biological clocks keep our brains and bodies on time, perhaps even on schedule for death

Times of Our Lives
Whether they're counting minutes, months or years, biological clocks help to keep our brains and bodies running on schedule

Getting the Goats
A national park struggles to rid itself of a charismatic ungulate

Seeing the Forest for the Trees
Biologists crane to see the canopy

Trends in Transportation: The Shape of Things to Go
Automakers turn to high technology in the search for a car that is clean, safe—and fun

Trends in Communications: The Road to the Global Village

Myocardial Infraction?
The evidence on cholesterol is subjected to interpretation

Diluvian Tremens
Policy initiatives could turn the tide on wetland loss

Too much Pressure?
Are deep-water divers risking their bones and brains?

One Hand Clapping
Digital audio is changing film sound. Will audiences notice?

Playing Demigod
Biologists find limits to tinkering with reproduction

Virus de Résistance
Drug-resistant viruses surface in AIDS patients

The Blood-Brain Barrier
More evidence links genes and intelligence

A Breed Apart
Finicky flies lend credence to a theory of speciation

Fertility Rites
Controversy and liability are limiting contraceptive options

Body Shop?
Advertising's infatuation with physiology has cooled

Yeast Meets Est(rogen)
A microorganism responds to a vertebrate hormone

Thrilled to the Marrow
Biologists finally corner the rare forebear of all blood cells

Language of Translation
Subtle chemistry helps a cell to read the genetic code

Nature, Nurture and Death
A study of adoptees suggests there is no escaping heredity

Cause and Affect
How does lithium counter both mania and depression?