In the world of tattoo culture, where ink traditionally serves as a tool for self-expression and aesthetics, a fundamental shift is taking place. Science is literally “implanting” new functions into the skin. Researchers from Boise State University (BSU) have made a breakthrough by introducing a multifunctional electronic tattoo (e-tattoo) that doesn’t just adhere to the skin but becomes an extension of it. This innovative platform integrates energy harvesting, storage, and biometric sensing into a single, ultra-thin structure.