Exceptional Hell Creek Nanotyrannus Tooth Pair, a Textbook Example of Tooth Replacement (private collection) A rare and scientifically important Nanotyrannus tooth from the Hell Creek Formation (Carter County, USA), professionally examined, cleaned and stabilized by a qualified paleontological preparator. The main tooth measures 8.4 cm (3.3 in), while the emerging replacement tooth below is 3 cm (1.2 in), a textbook example of theropod tooth replacement in action. The fully preserved root and developing replacement tooth show precisely how new teeth formed beneath older ones within the jaw. Restoration summary: The specimen was carefully cleaned and stabilized by a professional preparator. Old acrylic coatings and paint were removed to reveal the genuine fossil surface. Subtle color adjustments were applied to achieve a natural tone while maintaining full authenticity. Restoration work was intentionally kept to a minimum, focusing on preservation rather than reconstruction. Now recognized as a distinct species rather than a juvenile Tyrannosaurus rex, Nanotyrannus remains one of the most fascinating predators of the Late Cretaceous, making this specimen a rare opportunity for the discerning collector. #jurassicworld