Field

Understanding how electrons move or not through a solid material and so make a material a metal, an insulator or a semiconductor, for example, requires the development of "effective field theories" that don't go into all the details.

But it is difficult to constru...

Three different quantum field theories deal with three of the four fundamental forces by which matter interacts:

• Electromagnetism: It explains how atoms hold together.
• The strong nuclear force: It describes the stability of the nucleus at th...

Allowing parents to participate in their children's field trips can prove an inspired idea, as they often have great suggestions. 

Moreover, getting their feedback both before and after the trip might lead to the improvement of such activities.