References:
- http://bebrainfit.com/human-brain-facts/
- https://en.wikipedia.org/wiki/Brain_size
- http://www.sciencekids.co.nz/sciencefacts/humanbody/brain.html
- http://www.factslides.com/s-Brain
- http://www.brainhq.com/brain-resources/brain-facts-myths/brain-facts
- https://faculty.washington.edu/chudler/ffacts.html
- https://en.wikipedia.org/wiki/Brain
- http://www.nursingassistantcentral.com/blog/2008/100-fascinating-facts-you-never-knew-about-the-human-brain/
- http://facts.randomhistory.com/human-brain-facts.html