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Featured Image: Mammalian Regeneration
In the process of carrying out an autoimmunity experiment, the Heber-Katz research team noted that in the MRL strain of mice, punched ear holes used for long term identification rapidly closed without any sign of scarring.
Besides lack of scarring when the ear hole closed, a blastema formed and new hair follicles and cartilage grew back, processes not generally seen in adult mammals though thought to be part of a regenerative process seen in amphibians.