A skeleton of a Tyrannosaurus-rex called Stan is up for sale in New York.
The skeleton is 12m long and is believed to be one of the most accurate T-rex specimens ever found.
The skeleton will be auctioned next month in New York. Experts believe it will set a record price.
Stan was discovered in 1987 in Buffalo, South Dakota. It took over three years to excavate his skeleton of 188 bones, as well as reconstruct it.
The T-Rex has been exhibited in Dakota’s Black Hills Geological Research Institute. He has been used to make replicas for dozens of museums who wanted their own T-rex model.
Stan was named after the amateur palaeontologist who discovered him.
FACTS ABOUT STAN
Researchers believe Stan died around 60 million years ago when he was 20 years old.
Scientists think that T-rex usually lived around 28 years.
Only around 50 T-rex skeletons have been discovered since the first one was uncovered in 1902.
Back in October 1997, a T-rex called Sue sold for $8.4 million.