We discuss a new source of platelets, macrophages maintaining heartbeats, and the regenerative power of axolotls. Topics Anti-doping agency bans gene editing Lungs major source of platelets Macrophages help maintain a steady heartbeat Macrophages may also be key to heart regeneration in axolotls Axolotls are Masters of Regeneration Tattoo nanoparticles make their way to lymph nodes Keywords: axolotl, regeneration, macrophage, heartbeat, cardiomyocyte, tattoo, lymph node, platelets, lungs, CRISPR, nanoparticles