Common information found on a human evolution timeline includes the appearance of Hominina, Homo erectus and Homo sapiens. All three are different species, and their appearances occurred thousands of years apart.
The Hominina, which first appeared 7 million years ago, are believed to either be human ancestors and very closely related to human ancestors. Hominina evolved from chimpanzees, a species similar to humans that also has a larynx that repositions itself early in life to a position between the pharynx and the lungs.
The homo erectus evolved in Africa around 1.8 million years ago. Homo erectus looked very similar to modern humans, except Homo erectus's brain was only 74 percent of the size of the modern human brain. Homo erectus had a lesser forehead slope and smaller teeth than earlier human ancestors had. Around this time, Homo ergaster learned how to control fire.
Homo sapiens first appeared in Ethiopia around 200,000 years ago. Homo sapiens idaltu around the Awash River area began practicing mortuary rituals around 160,000 years ago. There is also evidence that the Homo sapiens idaltu butchered hippopotami, which is some of the earliest evidence of behavioral modernity. The Mitochondrial Eve is also believed to have lived in this area between 200,000 and 99,000 years ago.