This story is part of a series on how we make time—from productivity hacks and long walks to altering the function of our own circadian clocks. Before there was electricity or the internet or screens ...

Circadian clocks control physiological processes and behavior in virtually all living organisms. Now an international research team has created a detailed map of the internal clock in the brain of the ...

The circadian clock system allows the organisms to adjust to periodical changes of geophysical time. Today, increasing evidence show that disturbances in our internal clocks stemming from frequent ...

The world's first mechanical clocks were tower clocks built in Europe around 1270 to 1300 during the renaissance period. These clocks did not yet have dials or hands but told the time by striking ...