Daniel Holz, University of Chicago (IMAGE) University of Chicago Caption A decade of analyses by Daniel Holz, associate professor in physics and astronomy at the University of Chicago, and his collaborators suggest that the universe has produced many black-hole binaries in the mass range that are close enough to Earth for LIGO to detect. Credit Robert Kozloff/University of Chicago Usage Restrictions News organizations may use image in connection with reports about the research of Daniel Holz and his collaborators. License Licensed 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.