Many modern atomic clocks use oscillations of strontium atoms rather than cesium to measure time; the most precise of these is accurate to within 1/15,000,000,000 of a second.

In fact, the researchers note that if you started a modern atomic clock at the beginning of the universe’s birth — an estimated 13.8 billion years ago — and ran it through until today, it ...

The atomic clock, a marvel of modern science that measures the oscillation of atoms to mark time, is a testament to this journey as one of the most precise timekeeping devices in history, accurate ...

For a thousand years alchemists dreamed of transmuting mercury into gold. They never succeeded. Modern atomic physicists might do the trick without a philosopher’s stone, but do not think the ...