Biological timekeeping : the body's rhythms -- Calendar : different drummers -- Early clocks : home-made beats -- The pendulum clock : the beat of nature -- Successors : ubiquitous timekeeping -- ...

Galileo was the first to think to use a pendulum as a time keeper in 1637. An actual clock using the precise weighted mechanism was patented in 1656 by Dutch scientist Christiaan Huygens. Roughly 350 ...

Galileo is considered one of the greatest astronomers of all time. His discovery of Jupiter’s major moons (Io, Europa, Ganymede and Callisto) revolutionized astronomy and helped speed the acceptance ...

For millennia, humanity's one-and-only reliable way to keep time was based on the Sun. Over the course of a year, the Sun, at any location on Earth, would follow a predictable pattern and path through ...

Newton (What Makes Nature Tick) explains the premise of his slim volume in a single sentence in the introduction:""This book is about the rhythm of time, how that rhythm was finally regulated by ...