While most of the unique physical traits shared by hominins were developed by about 5 million years ago, the large brain that characterizes modern hominins developed

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The large brain that characterizes modern hominins began to develop about 2 million years ago, marking a significant point in human evolution. This development is associated with the emergence of the genus Homo, including Homo habilis and later Homo erectus, which showed a notable increase in brain size compared to earlier hominins.

While Most of the Unique Physical Traits Shared by Hominins