I am a bioinformatician working on regeneration. Two interesting observations here aside from the primary observation that stem cells can be made from stress:

I am a bioinformatician working on regeneration. Two interesting observations here aside from the primary observation that stem cells can be made from stress: - This only worked with differentiated cells from newly born animals. It didn't work with adults. They should investigate further to see what kind of epigenetic changes occurred throughout the lifetime of the animal to inhibit this stress response. This reminds me a bit of the aneurogenic limb experiments in salamanders. Is this a difference between development and regeneration? - The stem cells can make placental tissue. How did they determine this? Are they suggesting these cells are essentially totipotent?