Some animals see the world in shades of grey, while others perceive limited colours. Here are 10 animals that are colourblind ...

Under the transparent outer skin are two cell layers that contain red and yellow ... may exhibit green, because the somewhat contracted yellow cells allow blue-reflected light to pass through.

There was an opportunity Thursday night to catch the March 2025 "Blood Moon," a phenomenon that colors the full moon in ...

You can use a prism to split (or disperse) white light into a spectrum of colours: red, orange, yellow, green, blue, indigo and violet. Dispersed means that the colours are separated out.