neurons

In his book titled Addiction and Grace, Dr Gerald G. May M.D. writes.. No one knows for certain how many neurons exist within the normal human brain; they are literally uncountable. The best estimates range from ten billion to one trillion. We do know that neurons begin to form early in fetal life, and that by the tenth week of gestation they...
> terrydonovan/1050/how-complex-is-the-human-brain/