ASTROPHYSICS:
Competition Heats Up for Underground U.S. Lab
David Malakoff
A central player in a controversial bid to convert the Homestake gold mine in South Dakota into the world's deepest underground laboratory now says a retired Minnesota iron mine might be a better bet. He'll soon ask the National Science Foundation for up to $200 million to expand the Soudan mine to house cutting-edge detectors to study neutrinos and other natural phenomena.