BruxZir Â® Anterior is the latest advancement in the BruxZir Solid Zirconia product line. This highly esthetic restorative material is designed specifically to satisfy the esthetic and functional requirements of the anterior region of the mouth.ruxZir Â® Anterior is the latest advancement in the BruxZir Solid Zirconia product line. This highly esthetic restorative material is designed specifically to satisfy the esthetic and functional requirements of the anterior region of the mouth.
Ancient myths and legends tell of several mysterious underground cities filled with secret chambers, passages shrines and tombs. Many of these remarkable underground worlds remain shrouded in mystery because we have not been able to locate them yet.
But that's the case with these four secret subways hidden beneath the bustling streets of some of America's biggest cities. Starting in 1899, the Illinois Telephone and Telegraph Company dug under most of downtown Chicago, creating nearly 62 miles of tunnels, six feet wide by seven and a half feet tall. Their original intention was to house telephone cables, but the company also installed tracks to make getting around easier.