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Scientists Develop World's First Nuclear Clocks

These new devices track atomic nuclei and promise unprecedented accuracy for timekeeping and research.

AI-assisted coverage comparison, editor-supervised · How this was made

Published
The experimental clocks operate by firing very precise lasers at thorium-containing crystals. (Supplied: T. Schumm/TU Wien)

What this story says

  • Two independent scientific teams have developed the world's first functional nuclear clocks.
  • Unlike atomic clocks that track electron changes, nuclear clocks monitor shifts within an atom's nucleus.
  • These new clocks, utilising thorium-229, are so precise they would deviate by only one second over 30 million years.
  • Potential applications include enhanced navigation, mining surveys, earthquake prediction, and dark matter detection.

Who covered it

Left 23%(6)Centre 35%(9)Right 42%(11)

Percentages are shares of the 26 outlets carrying a published leaning rating. 26 of the 52 outlets we know ran this story carry no rating and are not counted in them. Coverage measured .

Trust

60/100

Craft

65/100

Hype

45/100

52 sources · methodology

Two independent teams of scientists have created the world's first functional nuclear clocks. These devices measure time by tracking changes within an atom's nucleus, a departure from current atomic clocks which monitor electron behaviour. The research, published in the journal Nature, details clocks so accurate they would lose only a second over 30 million years.

The nuclear clocks utilise thorium-229. Scientists have theorised about nuclear clocks for over two decades, but technological and theoretical limitations previously prevented their development. Recent breakthroughs in laser precision and material science have enabled the creation of these prototypes. Researchers anticipate rapid improvements to the technology.

Accuracy and Applications

While the current accuracy of these nuclear clocks does not surpass the best existing atomic clocks, their developers are confident in future improvements. Potential applications for this enhanced precision include more accurate navigation systems, detailed mining surveys, and improved earthquake prediction by measuring gravitational fields. The clocks could also serve as a new tool for fundamental physics research, including the detection of dark matter.

Coverage Comparison

Omissions in coverage

None of the left-rated digests mention the specific stability comparison between the Chinese and Viennese clocks that was highlighted in some centre and right-rated reports. None of the centre-rated digests mention the specific accuracy claim of one second over 30 million years, which was present in left and right-rated reports.

Still developing. We have re-checked which outlets are covering this 8 times, most recently on 8 Oct 2026, 12:15, and will add the sides that appear.

How each side covered it

Our own reading of the reporting listed below, written from the outlets’ articles rather than quoted from them. The reasoning is set out on our methodology page.

Left

6 rated outlets

  • Left-rated reports highlighted the potential for nuclear clocks to become the world's most accurate timekeepers, with ABC Australia quoting physicist Victor Flambaum stating they could be the "most accurate instrument humans have ever built." The Independent and The Independent (US) noted the breakthrough could help understand dark matter and other fundamental questions of the universe. IFLScience pointed to the clocks as a new tool for probing fundamental forces and hunting for dark matter. El Pais framed the development as the dawn of a new era in time measurement for exploring the laws of physics.

Centre

9 rated outlets

  • Centre-rated reports focused on the creation of the clocks and their potential to surpass atomic predecessors. The Japan Times mentioned a scientist envisioning uses in satellite navigation and data transfer synchronisation. Interesting Engineering and TechJuice specifically highlighted that China's nuclear clock demonstrated a six-times greater stability than the one developed in Vienna. Business Recorder noted the 50-year dream of nuclear clocks was now a reality, set to revolutionise timekeeping.

Right

11 rated outlets

  • Right-rated reports generally announced the creation of the world's first nuclear clocks, with India Today posing the question of why it matters. Globo and ARY News reported on the scientific teams in Vienna and Beijing developing the devices. OKDIARIO framed the development as the beginning of the age of nuclear clocks and a countdown to the most accurate time measurement in history. Kronen Zeitung reported that Vienna has the world's first atomic nuclear clock.

Questions about this coverage

How did the left and right cover Scientists Develop World's First Nuclear Clocks?
Of the 26 outlets on this story carrying a published leaning rating, 23% are rated left, 35% are rated centre, 42% are rated right. Those percentages are shares of the rated outlets, not of every outlet that ran it, which was 52. The sections above set out what each side emphasised, in its own terms.
Is Scientists Develop World's First Nuclear Clocks left or right?
Neither side dominates it. Of the 26 rated outlets on this story, 23% are rated left, 35% are rated centre, 42% are rated right, and no side holds the 70% this site would want before calling a field one-sided. A story is not left or right in any case; the outlets that carried it are what carry ratings.
Is the coverage of Scientists Develop World's First Nuclear Clocks biased?
Scientists Develop World's First Nuclear Clocks is one event reported by 52 outlets, and this page does not rate the story as biased or unbiased. What it publishes is the spread: which outlets ran it, where named rating organisations place each of them on the spectrum, and what each side chose to lead with. A leaning rating describes an outlet's record over time, not this article, and the two should not be run together.
Which outlets covered Scientists Develop World's First Nuclear Clocks?
52 that we know of, every one of them listed further up this page with a link to its own report and to what we hold on the publisher. Nothing here is a summary of somebody else's summary: the outlets are named so the original reporting can be read.
What is a nuclear clock?
A nuclear clock is a new type of timekeeping device that tracks changes within the nucleus of an atom, unlike traditional atomic clocks which monitor electron changes. This method allows for significantly higher precision in measuring time.
How accurate are these new nuclear clocks?
The newly developed nuclear clocks are extremely accurate, with a projected deviation of only one second over a span of 30 million years. This level of precision far exceeds current atomic clock capabilities.
What are the potential applications for nuclear clocks?
The high accuracy of nuclear clocks could lead to improvements in navigation systems like GPS, more precise mining surveys, and better earthquake prediction. They also offer new possibilities for fundamental physics research, including the search for dark matter.
Which elements are used in these nuclear clocks?
The nuclear clocks developed by the two independent teams utilise a specific isotope of thorium, known as thorium-229. This element possesses the necessary properties for precise timekeeping at the nuclear level.

Read it at the source

52 outlets, grouped by the leaning a published rating gives them. Every headline links to the original; an underlined outlet name opens our profile of that publisher.

Left

6

Centre

9
Show 1 more

Right

11
Show 3 more

Not rated

26
Show 18 more

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Nuclear Clocks Developed | MediaBias News