Wired takes a high-level look at present lines of research aimed at giving humans the regenerative capabilities of lower animals. The latter part of the piece also looks at the intriguing MRL mice, equipped with mighty regenerative capacities for a species of mammal: "[Heber-Katz] and her colleagues wanted to find out if other parts of these mice, known as the MRL strain, would also regenerate. So they performed some tests: They snipped off the tip of a tail, severed a spinal cord, injured the optic nerve and damaged various internal organs. All of the injuries healed, even the severed spinal cord. The results caused Heber-Katz to shift her research from autoimmune disease to regenerative medicine. Now, thanks to Darpa's call for grant applications in regeneration, scientists all over the country from various disciplines are working together on the MRL mouse."