What Are Different Brains Made Of?
How are brains built? What are the parts and pieces that make a brain what it is? Looking at the brains of different animals, we can see similarities and differences. They have similar shapes, with similar structures, but vary a lot in size and in their folds. So, are the brains of all animals built the same way? If that were true, the human brain would be a larger version of a rodent's brain. But several studies applying a new technique to count the number of cells that make up the nervous tissue says otherwise. Not all brains are built in a single way. The relationships between brain size and its number of neurons can vary a lot. This brings a lot of interesting consequences about how the brain changed in different species through the history of life.