Bone by bone, day by day. It’s taken half a decade to fully assemble Gus the T. Rex, and tomorrow, the 67-million-year-old specimen officially goes under the hammer at #SothebysNewYork. From excavation and identification to restoration and mounting, bringing together one of the largest and most complete T. Rex specimens ever to come to market has been a true labor of love. Here, Sotheby’s Cassandra Hatton and the excavation crew take a final look at the formation of this magnificent fossil. Estimated between $20-30 million, Gus is set to become the most valuable dinosaur offered at auction. Watch the short documentary at the link in our bio and tune in tomorrow for the Natural History live auction at 10AM ET. The Summer Season is presented in partnership with sothebysrealty.