«Since urine formation and excretion by the kidney is one of the most easily detectable rhythmic processes (we are forming and excreting much more urine during the day), we hypothesized that at least a part of this rhythmicity is dependent on the circadian clock mechanism,» said Dr. Tokonami. (sciencedaily.com)
1949 through the present Atomic clocks Mechanism: Microwave resonance of atoms Error: From 1 second every 300 years in 1955 to 1 second in 70 million years (2001) Accurate enough to: Synchronize GPS satellites (discovermagazine.com)
In his steampunk world of giant clock mechanisms, Alexander's routine involves repairing his precious clock tower every day, adjusting its mechanisms, oiling the gears and polishing everything down to the smallest piece. (uk.gamesplanet.com)