According to the AOPA the average age of single-engine general aviation aircraft in the U.S. is over 30 years old and is expected to continue increasing. One of the reasons aircraft age more gracefully than autos is the required maintenance. Aircraft are required to undergo an annual inspection by a licensed mechanic.
The inferior frontal gyri are located in the lower back portion of the frontal lobe on each side of the brain. Creativity depends on thinking skills that rely on the use of baseline knowledge combined with innovative thinking.
The cerebrum is the largest part of the human brain, and is associated with higher brain functions, including thinking. The outermost part of the brain is the cerebral cortex. The cortex has two hemispheres: the left, which controls the right side of the body, and the right, which controls the left side. The right side is more artistic, while the left is more rational. The cortex is divided into four sections or lobes.