Green Glowing Super Pigs

In Taiwan, researchers have bred pigs that glow green in the dark. Other scientists had created glowing animals before by transplanting genes from jellyfish into the pigs, but the Taiwanese team bred a much better version. From the article at bbc:

They are the only ones that are green from the inside out. Even their heart and internal organs are green, the researchers say. To create them, DNA from jellyfish was added to about 265 pig embryos which were implanted in eight different sows.

During the day, the transgenic pigs have a slight greenish tint in their skin and eyes, which just makes them look sickly. The idea here is to test how stem cells from pigs develop in other animals (and in the future, humans) and track them because the pig cells will be green throughout the process.