Snakes include some infrared in their reality, and honeybees include ultraviolet in their view of the world, and of course we build machines in the dashboards of our cars to pick up on signals in the radio frequency range, and we built machines in hospitals to pick up on the X-ray range.
Näiteks maod tajuvad  teatavat infrapunakiirgust, ja mesilased näevad ultraviolettkiirgust ning ka inimene on auto  armatuurlaua sisse ehitanud süsteemi, mis on raadiolainete levialas võimeline signaale eristama, samuti on haiglates masinad, mis töötavad röntgenkiirtega.