During adolescence, the body and mind go through many complex changes, some of which are difficult to deal with.

Many dwellings have been semiabandoned as inhabitants have moved to farms on the plain to return mainly for summer or for festivals.

In this chapter, the history of solving elliptic problems by direct marching methods is reviewed.

It is impossible to directly access the imaginations of others, to know precisely if and how an imagined 'irreal' future is felt by an individual or shared by a 'collective', or to know if one has shared it oneself.