All eyes detect light, and light behaves in a predictable manner. But it has a multitude of uses. Light reveals the time of day, the depth of water, the presence of shade.

In other words, the eye isn’t really a problem for evolution; in fact, nature can’t stop evolving eyes. And those eyes are incredibly varied: just look at some of the varied and bizarre eyes ...

Most sea-star species have compound eyes on their arms, but there has been no direct evidence that the eyes enable vision. In field experiments, Anders Garm at the University of Copenhagen and Dan ...

In the light of my cell phone, I saw four yellow-green eyes flashing up at me. Nope, not a bear, just two remarkably large raccoons. It is always rather exciting to see eyes glowing at you in the ...

A minimum of three, to be exact. As much as we may try, humans can’t see in complete darkness. But even in the presence of just a few light particles, special cells in our eyes activate.

How long can a scorpion live underwater? How many babies do they have at one time? What to know about Arizona bark scorpions ...

Light in the form of solar radiation influenced early civilisations and resulted in the independent development of a number of sun-worshipping dieties. These were of particular importance as ...

Imagine if a simple beam of light could one day treat conditions like nearsightedness or age-related macular degeneration (AMD). Researchers at the University of Nevada, Reno School of Medicine (UNR ...

Third Eye: One of the tuatara’s most fascinating features is its third eye, also called the parietal eye. This light-sensitive organ is situated on the top of its head, although it is covered by ...