Scientists at POSTECH University in South Korea have developed an injectable gel capable of naturally regenerating bone. Made from algae extracts and mussel proteins, the material hardens when exposed to regular light, creating a solid base that integrates with existing bone. The body gradually absorbs the gel as bone cells grow into it, allowing damaged areas to be restored without the need for invasive surgeries or bone grafts. Laboratory tests have been successful, paving the way for faster, safer, and less painful treatments for people with bone injuries or diseases.