❶ Researchers at the National University of Singapore have developed CHARM3D, a technique that uses 3D metal printing to create free-standing, self-healing metallic structures without support materials. ❷ The technology incorporates Field's metal, which has a low melting point, allowing for rapid fabrication of complex 3D structures. ❸ CHARM3D has potential applications in healthcare, such as non-contact vital sign monitoring and more accurate medical imaging, as well as in advanced security applications.