A phenomenon of quantum mechanics known as superposition can impact timekeeping in high-precision clocks, according to a theoretical study from Dartmouth College, Saint Anselm College and Santa Clara University.
General Physics
Oct 23, 2020
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881
People's exposure to environmental noise dropped nearly in half during the early months of the coronavirus pandemic, according to University of Michigan researchers who analyzed data from the Apple Hearing Study.
Environment
Oct 09, 2020
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89
Using radio telescopes observing distant stars, scientists have connected optical atomic clocks on different continents. The results were published in the scientific journal Nature Physics by an international collaboration ...
Astronomy
Oct 08, 2020
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221
A team of researchers from Germany and Austria has taken a new measurement of the nucleus of a thorium-229 isotope, moving one step closer to a nuclear clock. In their paper published in the journal Physical Review Letters, ...
A team of researchers from Nagoya University, Japan, has found the mechanism of the night-to-day transition of the circadian rhythm in green algae. The findings, published in the journal PLOS Genetics, could be applied to ...
Cell & Microbiology
Aug 05, 2020
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5
Two new studies led by UT Southwestern scientists outline how individual cells maintain their internal clocks, driven both through heritable and random means. These findings, published online May 1 in PNAS and May 27 in eLife, ...
Cell & Microbiology
Jul 02, 2020
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54
How do plants know when it is time to flower? Researchers at Martin Luther University Halle-Wittenberg (MLU) have studied this question and identified two genes that are key to this process. They were able to show that the ...
Plants & Animals
Jun 23, 2020
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388
Circadian rhythms are driven by a highly autonomous, self-sustaining circadian clock within cells, telling us when to sleep or wake up in a 24-hour cycle.
Molecular & Computational biology
May 27, 2020
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14
There are eight classical planets in our solar system, from speedy Mercury to distant Neptune. There are also numerous dwarf planets, such as Pluto and Ceres. While we continue to find more dwarf planets, there are some hints ...
Astronomy
May 25, 2020
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301
Researchers at the National Institute of Standards and Technology (NIST) have used state-of-the-art atomic clocks, advanced light detectors, and a measurement tool called a frequency comb to boost the stability of microwave ...
Optics & Photonics
May 21, 2020
3
1504
A clock is an instrument used to indicate, keep, and co-ordinate time. The word clock is derived ultimately (via Dutch, Northern French, and Medieval Latin) from the Celtic words clagan and clocca meaning "bell". A silent instrument missing such a mechanism has traditionally been known as a timepiece. In general usage today a "clock" refers to any device for measuring and displaying the time. Watches and other timepieces that can be carried on one's person are often distinguished from clocks.
The clock is one of the oldest human inventions, meeting the need to consistently measure intervals of time shorter than the natural units: the day; the lunar month; and the year. Devices operating on several different physical processes have been used over the millennia, culminating in the clocks of today.
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