Why do some objects such as windows and doors close in the winter but can be harder to close in the summer?

When the temperature rises some materials experience thermal expansion which means they get bigger, so it may make them harder to close because they don't fit as well.

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