Atomic clocks keep time by means of quartz crystals and periodic radio-controlled synchronization with the NIST atomic clock. Visitors to this website will find comparisons of radio-controlled clocks and watches.
A wall clock can serve as a stylish wall decoration in addition to telling time. Modern wall clocks use quartz movements run by battery power, while traditional wall clocks may rely on weights and pendulums.
A Swiss building designed and built using digital fabrication techniques and robotics as part of an experiment in architecture and engineering could illustrate the future of construction, Quartz reports.
Newsmax. Fri, 13 Sep 2019 13:40:12 EDT.