Alva Review-Courier -

GREAT FALLS, Mont. (AP) — University of Kansas researchers say they may have unearthed a rare fossil of a young Tyrannosaurus rex.

David Burnham of the university's Biodiversity Institute says the teeth suggest it's a T. rex, but there is still more work to be done before the species is confirmed.

The fossil could be that of a smaller species of another meat-eating dinosaur. Researchers are working to distinguish whether differences compared to the bones of other dinosaurs are due to growth or because they're from a different species.

Burnham says only a few young Tyrannosaurus rexes have...