A 67-million-year-old Tyrannosaurus rex skeleton sold for $50.1 million at Sotheby's in New York on Tuesday, becoming the most expensive dinosaur fossil ever auctioned. The final hammer price, which includes fees, surpassed the $44.6 million paid for the stegosaurus "Apex" in 2024 and far exceeded the pre-sale estimate of $20–30 million. The sale resets the benchmark in a market where only around 30 reasonably complete T. rex specimens are known to exist.

Discovered in 2021 on a cattle ranch in Harding County, South Dakota, the specimen—nicknamed "Gus" after the late landowner Gary Licking—was excavated over three field seasons by the Texas-based firm Theropoda Expeditions and required a further two years of laboratory preparation. The mounted skeleton measures 11.6 metres in length and 3.8 metres in height, comprising 183 fossilised bone elements. Sotheby's states the specimen is approximately 61 per cent complete by bone count, representing an estimated 75–80 per cent of the animal's original bone mass. The skull, preserved to roughly 82 per cent, bears a bite mark and other lesions consistent with combat or scavenging.

The winning bidder, who participated by telephone and remains anonymous, prevailed against six other prospective buyers during a ten-minute bidding round. Viewed from North American scientific circles, the outcome sharpens a long-running tension. The Society of Vertebrate Paleontology reiterated before the auction that privately held fossils risk becoming inaccessible for study, as peer-reviewed journals generally require specimens to be deposited in public institutions. European palaeontologists voiced similar concerns, with researchers in Italy and the UK noting that the price trajectory effectively excludes museums from competing. Sotheby's vice chair Cassandra Hatton countered that the meticulous documentation and preparation of "Gus" demonstrate how commercial interest can coexist with scientific standards.

The immediate question is the skeleton's destination. The previous record-holder, "Apex," was purchased by hedge-fund billionaire Ken Griffin and placed on long-term loan at the American Museum of Natural History in New York. Whether "Gus" follows a similar path into public view or enters a private collection will determine the extent to which researchers can continue to extract data from one of the largest and most complete T. rex specimens ever recovered.