From a distance, the slate gray roof and central white tower of the Brahekyrkan church appear charming. The idyllic building is situated on a small island in southern Sweden and surrounded by a cemetery dotted with flowers.So archaeologists weren't surprised when a construction project at the church uncovered several skeletons — but the grave held an 800-year-old mystery, too.Archaeologists began excavations at the Brahekyrkan church in Visingsö to prepare for the installation of a geothermal heating system, the Jönköping County Museum said in a March 27 news release.On the first day of the excavation, the team found two skeletons, Anna...