Sometimes a group of people see the words on the passages in different colors, such as the numbers seen blue or some words seen green. According to neuroscientists, these people have a condition called synesthesia. This Greek word means together and come from perception’s people and allowing for a combination of different sensory perceptions. Neurologist Richard Cytowic learned about synesthesia from his neighbor who tasted shapes and a colleague who saw the sound of his hospital pager as red lightning bolts. He and other scientists believe synesthesia is not abnormal, and that we all may experience it at birth. People with synesthesia retain indistinct sensory boundaries throughout their lives.