The world’s first fully bioluminescent, transgenic pigs were born in 2005, created by a scientific team from Taiwan University’s Department of Animal Science and Technology. They added DNA from bioluminescent jellyfish to approximately 265 pig embryos, which were in turn implanted into eight different sows. Four of these sows duly became pregnant, and three male bioluminescent piglets were born. Even in daylight they have a greenish tinge, which becomes a torch-like glow if blue light is shone on them in the dark, and not only their skin but also their internal organs glow. Stem cells taken from them will be used to trace human diseases, as the green-glowing protein that the pigs produce can be readily observed without the need for biopsies or invasive tests.