A screen displays a diagram showing the ripples in the fabric of space-time called gravitational waves that scientists have observed for the first time by the LIGO detector, confirming a prediction of Albert Einstein's theory of relativity, during a press conference at the National Press Club in Washington, DC, February 11, 2016. The machines that gave scientists their first-ever glimpse at gravitational waves are the most advanced detectors ever built for sensing tiny vibrations in the universe.The two US-based underground detectors are known as the Laser Interferometer Gravitational-wave Observatory, or LIGO for short. LOEB
{"Image ImageDescription": "A screen displays a diagram showing the ripples in the fabric of space-time called gravitational waves that scientists have observed for the first time by the LIGO detector, confirming a prediction of Albert Einstein's theory of relativity, during a press conference at the National Press Club in Washington, DC, February 11, 2016.\nThe machines that gave scientists their first-ever glimpse at gravitational waves are the most advanced detectors ever built for sensing tiny vibrations in the universe.The two US-based underground detectors are known as the Laser Interferometer Gravitational-wave Observatory, or LIGO for short.\n / AFP / SAUL LOEB        (Photo credit should read SAUL LOEB/AFP via Getty Images)"}