Newts are renowned for their outstanding regenerative capability, which allows them to repair damaged tissue, but the mechanism behind this ability had long remained unexplained. However, studies using the latest genome analysis techniques have revealed a regeneration gene that is specifically expressed in certain red blood cells. Accounting for around 25% of all red blood cells, these cells circulate throughout the body alongside the other red blood cells. Red blood cells —— also known as erythrocytes —— play a part in gas exchange by transporting oxygen to body tissues and receiving carbon dioxide in return. Scientists are achieving progress in research into newt-type regenerative medicine, which will facilitate human regenerative medicine through the application of this mechanism.