Zebrafish are the guinea pigs of the undersea world
, used by countless researchers across the world to study neuroscience, genomics, and just about everything in between. Though the fish are well understood, they also have qualities that still flummox researchers. Topping that list is the fishes' inexplicable ability to regrow brain cells
. The neat trick -- which is severely limited in humans and other mammals -- may have an unlikely origin, as new research suggests that the regenerative process is jumpstarted by inflammation
that can be severely damaging to the brain as well.