drool Friend of mine did some solar neutrino stuff in his grad studies at Gran Sasso: They used a sphere of liquid Xenon for their "Lake Baikal" and photomultiplier/detector arrays on the inside surface of an enclosing sphere (as seen above). 1.5 km underground. Tiiiight. Google "Borexino" for a bit more info, scant English though. Edit: NOPE. Friend looked for WIMPS at Gran Sasso using a similar setup to Borexino, though not as large, and his detector and scintillator geometries were cylindrical. Well, they never found any WIMPS. No one has. So I badgered him today about how that experience might have influenced his decision to go into a much more classical branch of experimentalism, where we are at least guaranteed to get a nonzero amount of novel insight. Also related, someone's office door has a little sign: "In theory, there is no difference between theory and practice. However, in practice, there is." Pretty hilarious wikipage on the source. No one will even see this edit; I'm bawling inconsolably.