The First Dinosaur Bone Found in Antarctica Was Sitting in a Drawer in Cambridge for 40 Years

[Leo70]

An unassuming fossil collected on James Ross Island in December 1985 by geologist Mike Thomson during a British Antarctic Survey expedition has turned out to be the first dinosaur bone ever found in Antarctica. Thomson recorded it in his field notebook as a vertebra of large reptile and it was shipped back to Cambridge where it sat in the BAS geology collection for four decades, unrecognised for what it actually was.

Dr Mark Evans, the collections manager at BAS, spotted it while reviewing archived specimens and immediately suspected it was something significant. He contacted Professor Paul Barrett at the Natural History Museum, who confirmed the identification without hesitation: a caudal vertebra from a titanosaur, a group that included the largest dinosaurs ever to walk the Earth. The bone is approximately ten centimetres long, 82 million years old, and has the distinctive hollow on one end and round bump on the other that creates a ball-and-socket joint unique to titanosaurs. Barrett told the BBC he knew what they were dealing with the moment he saw it. The study was published on June 29 in Acta Palaeontologica Polonica.

The animal was estimated at around 23 feet long, possibly a juvenile or an unusually small adult in a group known for record-breaking size. Because the fossil was found embedded in a marine rock formation alongside ammonites, the researchers suspect the animal died on land and its body floated out to sea before sinking and fossilising. Antarctica 82 million years ago was nothing like the ice-covered continent of today: it was forested, temperate and home to a rich cast of prehistoric species. The discovery not only adds a continent to the titanosaur's known range but serves as a reminder that museum collections worldwide are still full of unexamined specimens waiting to be recognised for what they are.

A Fossil From Antarctica Sat in a Drawer for 40 Years. It Turned Out to Be the First Dinosaur Bone Ever Found on the Continentwww.smithsonianmag.com