  When colliding, the high energy hadrons can either produce new particles or
scatter elastically without change of their quantum numbers and other particles
produced. Namely elastic scatterings of hadrons are considered in this paper.
The general machinery of their theoretical treatment is described. Some new
experimental data are presented and confronted to phenomenological approaches.
The internal structure of hadrons is the main subject of these studies. Its
impact on properties of their interactions is reviewed. It is shown that
protons become larger and darker with increase of their collision energy and
reveal some substructure. The violation of the geometric scaling in the
diffraction cone and new problems of description of differential cross sections
outside it are described.
