Over the past years, more and more sportsmen have revealed that their memory loss may have to do with frequent concussions during their active years. This head trauma, caused by a clash or heavy tackle, can result in brain damage with serious long-term health problems, including dementia and memory loss. Sadly, it can be difficult to notice such injuries when they occur. That’s why researchers have now developed a material that changes to different colors depending on how hard it is hit. They hope to use this material in protective headgear, protecting sports players by providing an indication when an impact could cause serious damage. It can also be used by soldiers whose head traumas are caused by bomb blasts on the battlefield.