Let's use humanoid robots to grow transplant organs

Scientists are already growing muscles, bones, and mini-organs in the lab. But these tissues are generally small, simple, and kinda wimpy. That's partly because a Petri dish is no match for the human body. Take, for example, skeletal muscle. Bioreactors--typically warm, moist vats where cells are grown--might induce some simple movements in lab-grown muscles, but it's nothing like the multidirectional bending and stretching of the human body, which helps our muscles grow and get stronger.