The bone is thought to have belonged to a sauropod, herbivorous dinosaurs with long necks and tails which were widespread in the late Jurassic era, over 140 million years ago.
Paleontologists excavate the thigh bone of a dinosaur in southwestern France.
The two-meter long femur was discovered this week at Angeac-Charente, a site where remains of some of the largest animals that ever lived on land have been dug up since 2010.
The bone is thought to have belonged to a sauropod, herbivorous dinosaurs with long necks and tails which were widespread in the late Jurassic era, over 140 million years ago.
"I am amazed by its state of preservation," Ronan Allain, a paleontologist at the National History Museum of Paris told Reuters on July 25.
Allain said scientists at the site near the city of Cognac have found more than 7,500 fossils of more than 40 different species since 2010, making it one of the largest such finds in Europe.