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Vienna and Beijing teams build first thorium nuclear clocks
Original: Teams in Vienna and Beijing have built the first thorium nuclear clocks
Research teams in Vienna and Beijing have independently built the first nuclear clocks based on thorium-229, a long-pursued milestone in precision timekeeping. Unlike atomic clocks, nuclear clocks use energy transitions inside an atom's nucleus, promising greater stability and new tests of fundamental physics. Scientists say the achievement could eventually improve GPS, navigation and probes of whether constants of nature change over time.
Why now: The first-ever construction of a nuclear clock is a major physics breakthrough with implications for precision measurement and fundamental science.
Evidence
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