What at naked eye it would seem to many like rocks on the mountain, to the ability of experts to recognize fossils means much more than that.
Archaeologists discovered the tail of a dinosaur 72 million years old discovered in Coahuila, Mexico. Look at the photos of the discovery:
The 50 vertebrae tail was discovered completely intact after archaeologists spent 20 days sifting through dirt and rocks to uncover it. One of the dinosaurs hips was also found. According to the INAH, dinosaur tails are a very rare find.
Francisco Aguilar, INAH's director in the border state of Coahuila said, that the tail probably make up half the dinosaur's length.