The cool trick about stem cells is that they’re super adaptable, and can become any other sort of cell, right? So why not use a mass of stem cells to regenerate a limb? Or grow an extra one? Well, it looks like it’s all a bit more complicated than that. According to new research on the self-regenerating Zebrafish, the fish don’t just form a mass of stem cells on a fin’s stump to regrow the limb. Zebrafish actually use a slurry of cells, of different origins and with different purposes. Think salad, not soup. More
