Fun and educating article. Reading that we once had three eyes, lead me to this paper: https://www.sciencedirect.com/science/article/pii/S0960982218302938 https

Fun and educating article. Reading that we once had three eyes, lead me to this paper: https://www.sciencedirect.com/science/article/pii/S0960982218302938 https://www.sciencedirect.com/science/article/pii/S096098221.... Fascinating that many vertebrates had a third light-sensing organ (called the pineal gland) on top of their heads millions of years ago. If our eyes are now the main mode of light transmission to the pineal gland, should we be wearing sunglasses all of the time?