Head trauma can cause brain damage that has serious implications for long-term health, but it can be difficult to notice such injuries when they occur. To solve this problem, a team of researchers has a developed a material that changes to different colors depending on how hard it is hit.
Some American football players on the field.
Head injuries can occur during sport, but it is often difficult to ascertain the extent of damage done to the brain.

They hope to use this material in protective headgear, protecting people such as soldiers and sports players by providing an indication when an impact could cause serious damage.

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