Researchers at the University of Science and Technology of China developed a strontium optical lattice clock with stability and uncertainty below 10⁻¹⁹, losing or gaining less than 1 second in 30 ...
RICHMOND, Va. — An ornate Qing Dynasty Chinese table clock sold for nearly $3.8 million at auction at the country estate of socialite and vintner Patricia Kluge, and bidders worldwide also paid top ...
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