Stone tools put early hominids in China 2.1 million years ago
Where did prehistoric humans live? Did they have fire, shelter or clothing to keep them warm and safe from the elements? - Quora
Stone tools put early hominids in China 2.1 million years ago
Becoming Human: The Origin of Stone Tools, Science
Oldest stone tools pre-date earliest humans - BBC News
Stone Age - Wikipedia
Hominids may have been cutting-edge tool makers 2.6 million years ago
Chinese Tools Indicate Humans Migrated From Africa 2 Million Years Ago
Frontiers Oldowan Technology Amid Shifting Environments ∼2.03–1.83 Million Years Ago
Dmanisi hominins - Wikipedia
Human Evolution – Historical Geology
2.9-million-year-old butchery site in Kenya suggests humans perhaps weren't first to use crafted stone tools - ABC News