Vulcans' unique physiology means their blood appears green instead of red, like humans in the Star Trek franchise.

In the mountains of Papua New Guinea, researchers encountered a clownish creature perched on a log in a fern meadow, basking in the sun. With its short, blunt snout and unique checkerboard pattern ...

Green pee can be caused by green ... Red or brown urine can indicate blood in the urine. That's associated with serious conditions including kidney stones, infections, and even cancer.

Photo by Stephen Richards 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 ...