Is the intersection between an arbitrary but fixed plane and the spati
al Poisson Voronoi tessellation a planar Voronoi tessellation? In this
paper a negative answer is given to this long-standing question in st
ochastic geometry. The answer remains negative for the intersection be
tween a t-dimensional linear affine space and the d-dimensional Poisso
n Voronoi tesssellation, where 2 less than or equal to t less than or
equal to d-1. Moreover, it is shown that each cell on this intersectio
n is almost surely a non-Voronoi cell.