The tick-tick sound comes from the movement of gears and parts inside the clock. In mechanical clocks, a part called the ...

Following is a transcript of the video. Devon Dey: Hi, I'm Devon. Today, I'm going to walk you through how I restore a 200-year-old grandfather clock. [clock chiming] Clocks that old weren't branded ...

Research into genetic mutations that affect circadian rhythms offers new insight into the rest-wake cycle and provides a new model for investigating human disease and ultimately developing medical ...