  Contrary to the widespread belief, the problem of the emergence of classical
mechanics from quantum mechanics is still open. In spite of many results on the
$\h \to 0$ asymptotics, it is not yet clear how to explain within standard
quantum mechanics the classical motion of macroscopic bodies. In this paper we
shall analyze special cases of classical behavior in the framework of a precise
formulation of quantum mechanics, Bohmian mechanics, which contains in its own
structure the possibility of describing real objects in an observer-independent
way.
