(Un)fortunately, in biology we have "model organisms" (mouse, fruit fly, zebrafish...). About them - we know everything. All the other talented outsiders are way much more difficult to work with. Protocols to maintain them are poor, there are no available kits for molecular biology, etc. Unfortunately, I think we will have to wait for decades until something practical emerges, although we have the technology today.

My first bet would be the development of radioprotectants.