Phys.org has an article about “Gus” the Tyrannosaurus rex. “Gus” lived during the late Cretaceous Period, about 67 million years ago. The fossil is about 61% complete by bone count and 75-80% by bone mass. It was discovered in Harding County, South Dakota in 2021. “Gus” is named after the late rancher Gary “Gus” Licking, on whose land it was found.

The auction is scheduled for July 17th, 2026 at Sotheby’s. The dinosaur is expected to sell between $20 million and 30 million.

One of the world’s most complete Tyrannosaurus rex skeletons, nicknamed “Gus,” was showcased Wednesday at Sotheby’s auction house in New York ahead of its sale later this month.

Valued at between $20 million and $30 million—the highest price estimate ever for a dinosaur—the giant fossil was discovered on a cattle ranch in South Dakota in 2021.

“Gus” lived during the Maastrichtian period, some 72 million to 66 million years ago, which was characterized by a warm climate, high sea levels and vast floodable coastal plains.