Search for Dark Matter (IMAGE) University of Chicago Caption Pictured here is the 1-liter bubble chamber during testing at MINOS Hall, 350 feet underneath Fermi National Accelerator Laboratory. Physicists installed a similar but larger bubble chamber for detecting dark matter this summer in a laboratory more than a mile underground in Sudbury, Canada. Credit Reidar Hahn/Fermilab Usage Restrictions This image may be used by news organizations in connection with reports about the work of Juan Collar and his colleagues. 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.