Another study on mice from the Ansary Stem Cell Institute at Weill Cornell Medical College.
The researches believe that in injuries, the blood vessels are the final judge to either enable regeneration or just cover the area by excessive scars. Endothelial cells in the bone marrow may also play a role in re-enabling regenerating abilities we, humans, loose in the early age.
Seems like more and more hope for all of us wishing to get default.