Do you know: 

• 80% of the world's people have a more developed left brain.
• Traditional abacus have 2 fives and 5 ones on each column because old Chinese unit of measure for weight is 16 based.
• Modern abacus have 1 five and 4 ones on each column because of 10 based calculation.  
• Dr. Roger Sperry of the California Institute of Technology won a Nobel Prize for his work on the functions of the brain's hemispheres.
• The right brain has a "high-speed, high-capacity memory" mechanism.