Human Evolution
The biodiversity that is known today has been said to be formed from very simple
unicellular organism due to evolution. In this evolution, origin of human evolution can be shown as per the picture given below. Last dinosaurs disappeared approximately seven crore years ago. At that time, monkey-like animals are said to be evolved from some ancestors who were more or less similar to the modern lemurs. Tail of these monkey-like animals of Africa is said to be disappeared about 4 crore years ago. They developed due to enlargement in brain their hands were also improved and thus ape-like animals were evolved. Meanwhile, these ape-like animals.
Remaining ape-like animals stayed in Africa and from them, gorilla and chimpanzee evolved about 2.5 crore years ago. Evolution of some of the 2 crore year old species of apes
seems to be occurred in different way. They had to use their hands more for eating food and
other work.
Those apes started to live on land as the forests started to decline due to dry environment.
Their lumbar bones developed in such a way that they started to stand in erect posture in
grasslands and thereby their hands became available for use, anytime. These first human-
-like animals with erect posture which were using their hands have evolved about 2 crore
years ago.
First record of human-like animal is with us in the form of ‘Ramapithecus’ ape from
East Africa. Afterwards, this ape grown up in size and became more intelligent and thus the ape of South Africa evolved about 40 lakh years ago.
The morphology of these human-like animals started to appear like to be the member of the genus Homo, about 20 lakh years ago and thus skilled human developed. About 15 lakh years ago, human walking with erect posture was evolved. It may have existed in China and Indonesia of Asian continent.
Evolution of upright man continued in the direction
of developing its brain for the period of about 1 lakh years and meanwhile it discovered the fire. Brain of 50 thousand year old man had been sufficiently evolved to the extent that it could be considered as member of the class- wise-man (Homo sapiens).
Neanderthal man can be considered as the first example of wise-man. The Cro-Magnon man evolved about 50 thousand years ago and afterwards, this evolution had been faster than the earlier.
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| Neanderthal man |
