Atapuercas
The Atapuerca Mountains in northern Spain are home to a series of important paleontological and archaeological sites that have yielded invaluable information about early human evolution. These sites, collectively designated as a UNESCO World Heritage Site, include several caves and fissures that have preserved fossils and artifacts spanning over a million years. The most significant discoveries at Atapuerca include fossils of Homo antecessor, an extinct human species thought to be a common ancestor of Neanderthals and Homo sapiens, and Homo heidelbergensis. Evidence of early hominin behavior, such as tool use and hunting practices, has also been found. The oldest human fossils found in Europe, dating back approximately 1.2 million years, were discovered at the Sima del Elefante (Elephant's Cave). Other key sites within the Atapuerca complex include the Gran Dolina, where Homo antecessor remains were found, and the Sima de los Huesos (Bone Pit), which contains a large collection of Homo heidelbergensis fossils. Ongoing excavations continue to shed light on the complex evolutionary history of humans in Europe and the wider world.