Because researchers have developed an injectable, nanoscale antenna, which they’ve used to allow mice to see beyond their normal visual spectrum and into the infrared. Which means we can’t see infrared and near-infrared light, which has wavelengths a little bit longer. [GH]: “This green light is absorbed by retinal cells.”Which the brain then interprets as regular visible light. This enhanced super-vision allows the animals to not only see in infrared, but to discriminate between different infrared patterns. The nanoparticles directly activated by the infrared light itself.”The nanoparticles remained active for as long as two months.