Early humans and modern humans
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Some diversity of Homo grouped into broader categories that Ancient Man, contrary to modern humans (Homo sapiens), 4t the beginning of the period 500,000 years ago. These categories usually quote Homo heidelbergensis, Homo rhodesiensis, Homo neanderthalensis and Homo antecessor may also be included.Theorized modern humans evolved from ancient humans, who evolved from Homo erectus. Type of early humans grouped under the binomial name "Homo sapiens" because of the size of the brain is very similar to modern humans. Early humans had a brain size of 1200 to 1400 cubic centimeters, which is beyond the range of modern humans. Early humans are distinguished from anatomically modern human skull from a thick, brow ridge bulges and prominence of the chin.
Anatomically modern humans appeared about 200,000 years ago and after 70,000 years ago (see Toba catastrophe theory) gradually marginalizing the kind of "ancient". This type of "non-modern" Homo certainly last until 30,000 years ago, and possibly up to 10,000 years ago. Which, if any, are grouped under the term "early humans" only a matter of definition and vary among authors. However, and according to recent genetic studies, modern humans seem to mate with "at least two groups" of the early humans: People Neanderthal and Denisovan.
New evidence suggests another group may have gone extinct 11,500 years ago, the Red Deer Cave People of China.
Category of early humans have flaws on an agreement on a definition. According to one definition, Homo sapiens is the only species that consists of several subspecies that include ancient and modern humans. Under this definition, modern humans called Homo sapiens sapiens and early humans also given the prefix "Homo sapiens". For example, the Neanderthals called Homo sapiens neanderthalensis, and Homo heidelbergensis is Homo sapiens heidelbergensis. Taxonomists prefer not consider the ancient and modern humans as a single species but as several different species. In this case the standard taxonomy used, Homo rhodesiensis, or Homo neanderthalensis.
The dividing line that distinguishes modern humans with archaic Homo sapiens and Homo erectus primordial man is very hazy. The latest fossils of anatomically modern humans such as Omo remains of 195,000 years ago known as modern humans. However, these early modern humans had a mix of ancient traits, such as eyebrow ridge being, but not outstanding.
The emergence of early humans is sometimes used as an example of punctuated equilibrium. This happens when a species by a significant biological evolution during a relatively short period of time. Then, the species is changing very little for a long period until the next stream. The brain size of early humans evolved significantly from 900 cubic centimeters in H. erectus to 1300 cubic centimeters. Since the size of the human brain reached peaks during ancient times, its size began to decline.
Robin Dunbar argues that early humans were the first to use the language. Based on his analysis of the relationship between brain size and a large group of hominids, he concluded that because of early humans have brains that are large, they must live in a group of more than 120 individuals. Dunbar stated that it is almost impossible to hominid to live in one large group without the use of language, otherwise there would be no cohesiveness and group will be split. For comparison, chimpanzees live in smaller groups up to 50 people.
Source: https://id.wikipedia.org/wiki/Manusia_purba