The Aporia · China’s thorium-229 nuclear clock beats Vienna’s on stability, studies show

Chinese and European teams have developed the world’s first nuclear clocks using thorium-229 nuclei embedded in crystals, with initial results showing China’s clock is six times more stable than Vienna’s. Both studies, published in Nature, demonstrate that these new timepieces measure time based on the nucleus of an atom rather than its electrons. The Chinese team also found their crystals could consistently keep accurate time when grown separately, while the European researchers attempted to detect dark matter with their device but were unsuccessful.

Written locally by qwen2.5:14b on 2026-10-07, using this article's own text rather than the other coverage of the same event (that is the story summary below).

Story summary

Two teams of scientists from Tsinghua University in China and Vienna University of Technology (TU Wien) have independently built the world's first nuclear clocks, which could become the most accurate timekeeping devices ever created. Published in the journal *Nature*, both clocks rely on thorium-229 nuclei embedded in crystals to track the steady rhythm within atomic cores rather than the orbiting electrons used by traditional atomic clocks. The Chinese team’s clock is six times more stable than its European counterpart, and it demonstrated consistent timekeeping across different crystal samples. These nuclear clocks have potential applications in navigation, mining, earthquake prediction, and exploring new physics realms but are currently in experimental stages with significant room for improvement.

Written for “Nuclear Clocks Accuracy Competition” on 2026-10-07, grounded in this article and the 1 other(s) covering the same event.

📰 Nuclear Clocks Accuracy Competition

Science · 2 article(s) covering the same event. See how they differ ↓

Article leaning vs. publisher reliability

Source leaning vs. consistency

This article reads unscored and hedges 40% of its claims. Each row says how that neighbour differs.

New nuclear clocks could become world's most accurate timekeepers same event · 100%

ABC News (AU)

⚖️ leaning not scored 🔴 28% hedged 11 of 39 📰 publisher trust 61

“Both articles discuss the first working nuclear clocks developed independently but contemporaneously, highlighting initial comparisons between the Chinese and Austrian clocks.”

South China Morning Post · 1807 article(s) · 4 correction(s) detected

Running correction rate · 4 correction(s)

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Ling Xin

8 article(s) here · 1 carrying a prediction

🔮 According to the latest papers, the Beijing scientists also showed that two crystals grown separately kept the same time – a sign such clocks could be reliably reproduced, they said.

2026-10-07 · mixed framing · China’s thorium-229 nuclear clock beats Vienna’s on stability, studies show

🔮 David vs Goliaths: Singapore builds most accurate clock ever, leaves US and China in dust The decade-long project could help to pave the way for a redefinition of the second, researchers claim in a new paper The clock, built with a single ion of a rare earth metal element known as lutetium, is so precise that it would lose one second every 260 billion years – nearly 20 times the age of our universe.

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2026-09-26 · mixed framing · Claims China’s BeiDou satellite was refuelled in orbit could change space race

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Also by Ling Xin

David vs Goliaths: Singapore builds most accurate clock ever, leaves US and China in dust

2026-10-02 · South China Morning Post

Claims China’s BeiDou satellite was refuelled in orbit could change space race

2026-09-26 · South China Morning Post

China gets closer to Jupiter mission by bringing Nasa’s StarNAV concept to life

2026-09-21 · South China Morning Post

China uses 100,000 home-grown AI chips to build leading weather forecast system

2026-09-16 · South China Morning Post

Nothing else under this byline is closely related to this article, so these are simply their most recent.

All 8 articles by Ling Xin →

China Chinese European Nature Vienna

Vienna GPE · 4× Beijing GPE · 2× China GPE · 2× Chinese NORP · 2× European NORP · 2× Nature ORG · 2× TU Wien ORG · 1× Thorsten Schumm PERSON · 1× Tsinghua University ORG · 1×

The clocks were developed independently but both the Chinese team, led by Tsinghua University in Beijing, and the researchers at Vienna’s TU Wien used thorium-229 nuclei embedded in crystals to keep time by the steady rhythm of the atom’s core, rather than the electrons whirling around it, as in atomic clocks.

framing: mixed · carried by 1 article(s) · first seen 2026-10-07

🔮 According to the latest papers, the Beijing scientists also showed that two crystals grown separately kept the same time – a sign such clocks could be reliably reproduced, they said.

2026-10-07 · South China Morning Post

China’s thorium-229 nuclear clock beats Vienna’s on stability, studies show · mixed framing

China’s thorium-229 nuclear clock beats Vienna’s on stability, studies show Chinese and European teams in ‘fierce but friendly’ competition to develop the next-generation timepieces Initial results from the world’s first two working nuclear clocks indicate that China’s timepiece is about six times as stable as the one in Vienna, according to papers published this week by the journal Nature. uncertain

timepiece → beat → journal

The clocks were developed independently but both the Chinese team, led by Tsinghua University in Beijing, and the researchers at Vienna’s TU Wien used thorium-229 nuclei embedded in crystals to keep time by the steady rhythm of the atom’s core, rather than the electrons whirling around it, as in atomic clocks. asserted

team → develop → clocks

When Nature reported in June that the two teams had separately developed the radical new devices, Thorsten Schumm, a member of the European team, said that “now we have a fierce but friendly global competition”. asserted

we → report → competition

According to the latest papers, the Beijing scientists also showed that two crystals grown separately kept the same time – a sign such clocks could be reliably reproduced, they said. uncertain

they → accord → sign

Meanwhile, the Vienna team used its clock to hunt for dark matter, without success. asserted

team → use → success

China’s thorium-229 nuclear clock beats Vienna’s on stability, studies show

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