This article reports that scientists have discovered that while hibernating, bears have an amazing ability to heal injuries, sometimes awakening with almost no scarring on even serious wounds.  The way they do this in still unknown, but it bears (sic) further study as it has possible significant medical implications.

As an aside, the face that bear above is making cracks me up, as I've seen the same sheepish look on more than one black bear staring back at me from the weeds.  What dopey jokers they are.