7 Goats And Cows That Lactate Human Milk. In 2009, Russian and Belarusian scientists genetically modified goats to produce human breast milk. They weren’t able to make the milk 100 percent human. But they were able to fill it with human cells, creating milk that had 60 percent of the lysozyme and lactoferrin that characterize human milk.

The human-animal mixtures are being created by injecting human stem cells into days-old animal embryos, then gestating these in female livestock.

Harvesting human hearts from goats can shatter this protective belief, leaving us feeling disgusted and dismayed. Human-animal hybrids turn one’s mind to the inevitable fact that we will all be...

One might wonder how a human-cow hybrid could produce stem cells that scientists can study for their usefulness in fighting human diseases like Parkinson's and Alzheimer's. In reality, the stem cells that result from the process of combining a bovine egg with human DNA end up being 99.9 percent human .

Like mules, the male version of the hybrid is infertile, but female dzo, or dzomo, are fertile, allowing for the “back breeding” of three-quarter mixes. The hybrids are larger and stronger than the yaks and cattle of the region, making them ideal pack animals for hauling gear to the base of Mount Everest.