About 550 million years ago, an organism containing a genetic modification resembling an eye first appeared. In the ensuing half billion years, the eye has transformed into a strikingly impressive organ. For us bipedal hominids, nearly 100 million light-sensitive tissue cells (known as rods and cones) capture incoming light from the pupil and send information along the optic nerve to the brain for processing.
A Hidden Darkness
A Hidden Darkness
A Hidden Darkness
About 550 million years ago, an organism containing a genetic modification resembling an eye first appeared. In the ensuing half billion years, the eye has transformed into a strikingly impressive organ. For us bipedal hominids, nearly 100 million light-sensitive tissue cells (known as rods and cones) capture incoming light from the pupil and send information along the optic nerve to the brain for processing.