Brain Facts:

• Percentage of brain in relation to total body weight (150 pound human) = 2%
  
• Energy consumed by brain: 20%
  
• Average brain width = 140 mm
  
• Average brain length = 167 mm
  
• Average brain height = 93 mm
  
• Average number of neurons in the brain = 100 billion

 

Take the Free Brain Age Test
and compare the score to
your actual age.ff