ABSTRACT
All life-forms require methods for sensing the environment. Being able to sense one’s surroundings is of such vital importance for survival that there has been a constant race for life-forms to develop more sophisticated sensory methods through the process of evolution. As a consequence of this process, advanced life-forms have at their disposal an array of highly accurate senses. Some unusual sensory abilities are present in the natural world, such as the ability to detect magnetic and electric fields, or the use of ultrasound waves to determine the structure of surrounding obstacles. Despite this, one of the most prized and universal senses utilized in the natural world is vision.
