Their tongues are green, so are their bones, their muscles and every drop of blood in their bodies. In fact, the name for this group of lizards is Prasinohaema — Greek for green-blood.

Across the tree of life we can find blue blood, green blood, purple blood, even clear blood. Why does it come in so many colors? Of all the juices in your body, blood is by far the most important.

Some animals have evolved with blood that appears blue, green, purple, or even milky white. These unique colours are caused by different oxygen-binding molecules or other compounds in their ...

This distinctive and elusive variety turned out to be a new species, belonging to a family of skinks known for having green blood, according to an April 15 study published in the peer-reviewed ...