  The overlap of the nucleons in nuclei plays an important role in
understanding the nuclear dependence of deep inelastic scattering data. It is
shown that the nuclear modification of the higher twist scale can be
essentially determined by the overlapping volume per nucleon and this effect
gives a large contribution to nuclear shadowing for small $x$ and low $Q^2$. In
this kinematical region there is also a moderate enhancement of the
longitudinal structure function in nuclei.
