Algerian paleontologists have discovered the well-preserved fossil of an 160 million-year-old dinosaur in the Sahara desert, the official APS news agency said on Wednesday. The find in the Ain Sefra area included 51 bones of a herbivorous sauropodus, a large dinosaur from the Jurassic period around 150 million to 160 million years ago when the Sahara was covered with forests.