Colossal Biosciences, the company working on project, said in 2023 that they hope to resurrect the wooly mammoth within four years. Now, the team has created important stem cells that are currently considered vital for the plan to work. These newly created stem cells come from Asian elephant cells, which can develop into any type of tissue. The idea is that scientists fuse an edited stem cell to an Asian elephant egg, that egg would then be implanted in a surrogate.