Stem-cell research is all the rage these days, with the prospect of being able to grow rejection-free organs for transplants a revolutionary idea that could save thousands of lives. Still, growing a new organ to replace your faulty one means you still need to go through an organ transplant, which is kind of a bummer. Researchers at Hydra Biosciences in Boston are currently at work on protein-based drugs that would spur organs to regenerate, putting aside all that cutting and opening in certain instances. The entire process is very low impact: you take the drugs via an inhaler or supersonic drug gun (which is awesome in itself), and once in your bloodstream they bond to the damaged muscle cells and stop genes that prevent cell division from being active. Once the cells start to multiply it'll be just a couple of weeks until you're good as new, in theory. You can imagine that in the future when patients are faced with a choice between a heart transplant and using a supersonic drug gun and waiting a couple of weeks, there isn't going to be a lot of deliberation.