Going once, going tri…ce

A 66-million-year-old triceratops fossil hits the block today, with bids projected to reach as high as $5.5M through the March 31 deadline. Roughly the size of a minivan and nicknamed “Trey,” the fossil is one of the most complete triceratops skeletons ever unearthed.

Trey was discovered in 1993 near Wyoming’s Lance Formation, a geologically rich area home to low-lying floodplains and rivers at the end of the Cretaceous period—a sedimentary environment ideal for preserving remains. For paleontologists, the region provides a snapshot just before the cataclysmic asteroid that wiped out the dinosaurs. The sale comes as the auction market for dinosaur fossils has surged, with recent bids including “Stan” the T. rex in 2020 ($31.8M), “Apex” the stegosaurus in 2024 ($44.6M), and an unnamed ceratosaurus in 2025 ($30.5M).

Dinosaurs roamed the Earth for over a hundred million years. Discover where and when with this interactive map: