This modified protein could be used for wound dressings, carrying oxygen toward the skin, as NewSci reports. This doesn't mean life could survive without any water at all, because the protein would never be found this way in nature. But could we produce waterless blood protein for easy transport? Artificial blood already exists; maybe future versions will not need water to work. One of the main obstacles facing extraterrestrial colonists is water — the lack thereof anywhere else we can find, and the huge costs involved in transporting our own supply. But maybe future humans pumped full of polymerized blood could survive without it.