The Brain
An adult brain weighs up to 3 pounds. It is made up of over 100 billion nerve cells. It can store between 100 trillion and 280 quntillion bits of information!
The brain performs many functions other than thinking.
The central nervous system comprises of the brain and the spinal cord.
All sorts of mesages are continually being sent to the brain via the nervous system.
The brain is interpreting these signals and responding in various ways. We are unaware of much of this activity and we are not making conscious decisions on how to respond to these messages.
Yet we are able understand a lot about our environment and what is happening around us and to us. We are even able to anticipate potential future events and work out what to do next!
The brain is a memory store and can return an answer to a question instantly. A computer needs to sequentually scan data looking for the answer. It might uses indexes to cut down the range of the search but it can only find data by following a given computer program designed by a human being!
We have to use our brain to control parts of our body, walking, picking something up, catching a ball, controlling a car, etc. Everything we do uses our brain.
The process of thinking
The brain gives people the ability to think, the ability to come to new conclusions and the ability o invent new concepts and ideas. Our memory contains information to allow us to remember a huge amount of information.
The complexity of the human brain
If you cannot imagine how human beings came to exist by pure chance then your thinking will be supported by some of the details of the operation of the human brain
According to 'What Darwin Didn't Know' by Geoffery Simmonds M.D., the brain can store up to 280 quintillion bits of information in three pounds weight of brain matter. It uses approximately 15% of the bodies oxygen and 20% of the bodies calories.
Could the brain evolve?
The brain is part of a complex neurological system. If the 100 billion cell neurological system had started with a single cell then it would require an average of 33 new and different neurons to be added each year. It is a lot more complicated than that because each change has to take place in a human being who had evolved all the previous neuron updates!!
References:
**1 - "What Darwin Didn't know - Geoffrey Simmonds M.D. - ISBN 0-7369-1313-0
human eye image in public domain. Author:Rhcastilhos