Fun Fact of the Day: A bruise or contusion is caused by some kind of knock or bump to the skin. When your body starts to metabolise these cells – literally reabsorbing them – then the bruise will go through a series of colour changes – from red to purple, purple to blue/black, blue/black to green, green to yellow before finally turning a browny skin tone. This colour means the injury is nearly completely healed.
Fun Fact of the Day: Our retinas contain two types of light sensitive cells, rods and cones. The rods are used to detect light intensity and brightness while the cones are responsible for color vision. We have three types of cones capable of recognizing red, green and blue. These are the primary colors, and combining any two will give us the secondary colors of green, cyan and magenta. All these hues in different combinations and intensities give us the many colors that we know and see every day.