CLICK). The UK Institute of Physics commissioned Lyndall to create something arty to promote underground particle detectors to the public. She discussed the idea with physicist Dr Ben Still to gain an insight into the process. The resultant artworks were then installed in two vast brick-lined wells built in the 19th century to store ice. They lie beneath the museum. To descend into the depths you need to be fit, wear sensible shoes and a hard hat (latter provided), be aged 11 or over, have both hands free, book in advance and be prepared to get dirty! The ice wells will be open at weekends and Thursday afternoons until 20 October. I'm not sure I'd fancy paying £4 to view a glorified Christmas tree underground, but each to his own. CLICK for a BBC video.