There are several forces or adaptations that led to the evolution of bipedalism, such as physical changes on the environment that leading to a longer search time of food across longer distances. Also, the ability to move faster and carry objects such as food or tools. Furthermore, it is believed that bipedalism evolved for a better reproductive success and because less surface area of the body is indirect contact with the sun, thus allows cooling more rapidly and efficiently.
The forces that lead to the evolution of a larger brain are believed to be linked to interactions between our ancestors in complex groups. These interactions include communication among them which lead to the development of language. Moreover, their ability of free hand movement lead to the ability to performed many different more complex activities and some of them at the same time. In order for this to be able to be achieved an enlarged brain must have evolved.
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I agree with your post. I wonder what would have happened if we had no interactions whatsoever with other organisms. I wonder if our brain would have still changed.
ReplyDeleteGood post, I agree with what you said. I also think it's good to look outside the readings for some more explaination
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