"Hot cocoa has an ideal temperature of 60 degrees Celsius. At this temperature, marshmallows melt slowly and mouth burns are avoided, but the cocoa remains warm. The graph above shows the heating curve for Brett's microwave. Based on the graph to the nearest half-minute, how long should Brett heat his cocoa?"

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later