Cellerant has dosed radiation-ravaged lab mice with other mice's purified stem cells and watched them recover to full health in months.

FORBES: Rebooting the Body

To keep unwanted radiation out of the lab, scientists are going to unusual lengths.

WSJ: Physicists Look for Dark Matter Underground

In Dr. Xu's lab, virtual patients are exposed to virtual radiation in doses similar to that of a CT scan or cancer-radiation treatment.

WSJ: Scientists Find Safer Ways to Test Medical Procedures