The document discusses several facts and myths about the human brain: - Bigger brains are smarter between species, but brain size does not correlate with intelligence within a species. Only 10% of the brain is actively used. Sleep aids memory formation and new brain cells can grow. Bad diets and negative thinking can impact the brain. You can be brain dead but alive. The brain is the most complex structure, weighs around 1.5kg, and has the consistency of cooked oatmeal. It is made up of fat and electricity and contains over 100 billion nerve cells. The two hemispheres control opposite sides of the body and are linked by the corpus callosum. Each hemisphere contains four lobes - frontal, par