Question

We only have 5 known senses. What if we have other senses but are unable to utilize them because we use less than 1/5th of our brain?

Answer 1

Actually studies have shown that that is a myth. We use all of our brain in order to carry out all the complexities of life.

Explanation:

"It turns out though, that we use virtually every part of the brain, and that [most of] the brain is active almost all the time," Gordon adds. "Let's put it this way: the brain represents three percent of the body's weight and uses 20 percent of the body's energy."-neurologist Barry Gordon at Johns Hopkins School of Medicine

"Scientific American", Feb. 7, 2008 by author Robynne Boyd