"In this image, the middle ""explosion"" is a cloud of hot electrons, inside graphene, that bounce off one another as they reach equilibrium and spread out. The red spheres are those electrons that are energetic enough to escape the hot cloud in less than 30 femtoseconds and generate an electric current. MIT researchers have developed a technique to access and control these ultrafast processes. - Image Credit: Ella Marushohenko (Ella Maru studio)"