Perfect timekeeping is more complicated than you think. Most clocks slow down over time (not that many people notice), and tiny imperfections in the manufacturing process ensure that no two timepieces ...

While not primarily useful for telling the time, nuclear clocks could allow scientists to test humankind's fundamental understanding of how reality works. Thorsten Schumm is a clockmaker, but not the ...

For the first time, scientists used an atomic nucleus as a clock. The world’s most precise timepieces are made using atoms, specifically their electrons. But clocks based on atomic nuclei — protons ...