New tests of Relativity's time dilation effects have been verified to even greater accuracy.
An international team of researchers used a particle accelerator to whizz two beams of atoms around a doughnut-shaped course to represent Einstein's faster-moving clocks.
They then timed the beams using high-precision laser spectroscopy and found that, compared with the outside world, time for these atomic travellers did indeed slow down.
"We were able to determine the effect more precisely than ever before," said lead researcher Gerald Gwinner of the University of Manitoba in Winnipeg, Canada.
"We found the observed effect to be in complete agreement."