Homo erectus is an extinct species of early human that lived approximately 1.9 million to 110,000 years ago. This species is known for its upright walking posture and is considered a direct ancestor of modern humans, Homo sapiens. Homo erectus had a larger brain than earlier hominins, averaging about 900 to 1,100 cubic centimeters, which suggests advanced cognitive abilities. Fossils of Homo erectus have been found in Africa, Asia, and Europe, indicating that they were one of the first hominins to migrate out of Africa. They are also associated with the use of tools, including hand axes, and evidence suggests they may have used fire for cooking and warmth.