  We use a fully GPU $N$-body code to demonstrate that dark matter minihalos,
as a new component of globular clusters, resolve both the timing and cusp-core
problems in Fornax if the five (or six) globular clusters were recently
accreted ($\leq$ 3 Gyr ago) by Fornax. Under these assumptions, infall of these
globular clusters does not occur and no star clusters form in the centre of
Fornax in accordance with observations. We find that crossings of globular
clusters that have DM minihalos near the Fornax centre induce a cusp-to-core
transition of the dark matter halo and hence resolve the cusp-core problem in
this dwarf galaxy. The dark matter core size depends on the frequency of
globular cluster crossings. Our simulations clearly demonstrate also that
between the passages, the dark matter halo can regenerate its cusp. Moreover,
our models are in good agreement with constraints on the dark matter masses of
globular clusters as our clusters lose a large fraction of their initial dark
matter minihalos. These results provide circumstantial evidence for the
universal existence of dark matter halos in globular clusters.
