Every year, hundreds of thousands of people around the world lose their lives due to uncontrolled bleeding, whether from accidents, natural disasters, or traumatic injuries. But a new breakthrough may soon give first responders a powerful new way to act faster than ever.

Researchers at the Korea Advanced Institute of Science and Technology (KAIST) have developed a spray-on medical powder that can seal life-threatening wounds almost instantly -- in about one second. When applied, the powder reacts immediately and forms a strong, gel-like barrier that stops heavy bleeding, even from deep or uneven injuries where traditional bandages fail.

Unlike many existing bleeding-control products, this spray is lightweight, easy to use, and designed for high-pressure emergency situations. It also remains stable at room temperature for long periods, meaning it could be stored in ambulances, disaster relief kits, military supplies, or remote clinics where rapid care is critical.

Early testing suggests the powder not only halts bleeding quickly but may also support healing in damaged tissue. While originally developed with battlefield injuries in mind, researchers hope it will soon become a tool for everyday emergency medicine around the world.