“Even as they try to reclaim what was lost, they and others are also taking advantage of a rare scientific opportunity. The cathedral, laid bare to inspection by the fire, is yielding clues to the mysteries of its medieval past. ‘We’ve got 40 years of research coming out of this event,’ says LRMH Assistant Director Thierry Zimmer.” Here’s an in-depth look at what the teams are doing. (Well, were doing, before work was suspended.) – Science