Double pulsar (IMAGE) University of East Anglia Caption Researchers have conducted a 16-year long experiment to challenge Einstein’s theory of general relativity. The international team looked to the stars - a pair of extreme stars called pulsars to be precise – through seven radio telescopes across the globe. Credit Max Planck Institute for Radio Astronomy Usage Restrictions None License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.