A 67-million-year-old T. rex named Gus could sell for up to $30 million at auction

For anyone who has ever dreamed of having a piece of natural history in their possession, a unique opportunity will soon arise. This will come in the form of an enormous prehistoric skeleton, which is poised to take centre stage in the Sotheby’s New York natural history auction. This prehistoric find is of great significance owing to its size and preservation.Affectionately referred to as Gus, the impressive Tyrannosaurus rex rises to a height of twelve and a half feet with a length that measures approximately thirty-eight feet. It is not often that one comes across a fossil of such a giant, mature, apex predator, hence the reason why it is one of the highest pre-sale estimates ever placed on a dinosaur fossil.The transition from a tranquil ranch to the magnificent galleries entailed hard work in the field and rigorous scientific analysis spanning several years. With all the bones now assembled, there lies an intricate historical jigsaw puzzle pieced back together. These skeletal remains are an important record of some of the great animals that roamed the Earth ages ago, and have generated significant anticipation leading up to their unveiling.A tale of the long journey from the ranch in South Dakota to the auctionThis specimen’s saga starts at a cattle ranch in Harding County, South Dakota, located in the renowned Hell Creek Formation owned by the late Gary Licking. The rancher had been finding strange teeth and little bone fossils surfacing through the ground of his farm for many years before deciding to call upon the excavation team from Theropoda Expeditions to dig deeper.The field team initiated their search within a massive six-and-a-half-thousand-acre section of the property, locating the first remains of the dinosaur in 2021. Sadly, the rancher passed away just one year into the complex extraction process, never getting the chance to see the fully completed skeleton. In a fitting tribute to his discovery, the field team chose to name the Tyrannosaurus rex Gus in his honour.The extraction from the ground took much time and effort because three whole summers were needed for excavating, with the team spending weeks at a time in order to find a fossil piece. After the end of the field research, three more years were devoted to laboratory work, where specialists painstakingly extracted individual elements, cleaning and studying them. Thus, in total, there are one hundred and eighty-three pieces of bones, comprising approximately about 63% complete by bone count and seventy-five to eighty per cent complete in terms of the total bone mass of the dinosaur. Anatomy of a prehistoric titan heading to the auction blockThe upcoming natural history auction will showcase the exact structural and anatomical details that make Gus a uniquely complete specimen. According to Sotheby's auction platform, the skeleton belongs to a remarkably robust, adult individual that lived approximately 67 million years ago during the Maastrichtian stage of the Late Cretaceous period. The exhibition-ready mounted skeleton features a massive fifty-four-inch skull, preserving eighty-two per cent of its original cranial bones along with all six dentitions intact.Beyond its size, the skeleton features several rare anatomical elements that are seldom preserved in fossil records. The specimen boasts a very rare fossilised furcula, or wishbone, a completely represented pelvis, and two well-represented hind feet, which is a level of structural completeness known in a level of completeness rarely seen in T. rex specimens. Furthermore, the mount features thirty rarely discovered gastralia, or belly ribs, precisely articulated across a custom steel armature that holds the ancient predator in an accurate predatory pose.The surface of the fossilised bones tells a clear story of prehistoric survival and conflict. Forensic analysis of the skeleton reveals a variety of pathologies, including clear tyrannosaurid bite marks to the skull bones and the right dentary lower jaw, sustained either during active combat or post-mortem scavenging. Additionally, the axial skeleton holds evidence of injuries that occurred during the life of the individual, with fractured and completely healed bones clearly discernible across several ribs and belly elements.A high-stakes event which inspires a scientific controversyThis unique item is to be put up for sale at a natural history auction run by the auctioneer Sotheby's. Owing to the remarkable condition and the completeness of Gus, experts have given the item a preliminary price evaluation of twenty to thirty million dollars.As much as the anticipated auction has been creating interest among private buyers, it further serves to bring out an ongoing conflict within the scientific community. Many palaeontologists have expressed concern when private buyers buy such fossils. The fear is that once fossils get sold off to such buyers, they will no longer be accessible for public scientific research since they represent unique historical assets.In spite of all the discussions that have been going on for some time, there will soon be a unique opportunity to see this wonder from the dawn of time. The plans are to put Gus on display in the specialised galleries of New York, starting July 1st, so the public will finally be able to get acquainted with the beast that roamed our planet sixty-seven million years ago, prior to the closing auction on 14 July.