Cazekiel (1417893) writes "Observing the primordial sound waves created 30,000 years after the Big Bang, physicists on the Baryon Oscillation Spectroscopic Survey (BOSS) have determined our universe's most precise measurements: 13.5 billion years old.
This article detailing the study reports:
“We’ve made precision measurements of the large-scale structure of the universe five to seven billion years ago – the best measure yet of the size of anything outside the Milky Way,” says David Schlegel of the Physics Division at the U.S. Department of Energy’s Lawrence Berkeley National Laboratory (Berkeley Lab), BOSS’s principal investigator. “We’re pushing out to the distances when dark energy turned on, where we can start to do experiments to find out what’s causing accelerating expansion.”"
Link to Original Source