Question: do dolphins use 20 percent of brain?
Answer: A dolphin uses 100% of it's brain, as do humans. ... The “myth” (as I can safely call it) regarding the percentage of brain-use is that we humans use only 10% of the organ in our heads. This is a little exaggerated. In actuality, it's the conscious cognitive part of our brains that is only put to labor 10% of the time.