  This papers briefly reviews the progress in studying the long-lived
filamentary structures of a skeletal form (namely, tubules and cartwheels, and
their simple combinations) in electric discharges in various fusion devices.
These include fast Z-pinch, tokamak and laser produced plasmas. We also report
on the results of a search for the phenomenon of skeletal structures --
formerly revealed in laboratory data from fusion devices -- at larger and much
larger length scales, including the powerful electromagnetic phenomena in the
Earth atmosphere and cosmic space. It is found that the similarity of, and a
trend toward self-similarity in, the observed skeletal structures more or less
uniformly covers the range 10^{-5} cm - 10^{23} cm. These evidences suggest all
these skeletal structures, similarly to skeletons in the particles of dust and
hail, to possess a fractal condensed matter of particular topology of the
fractal. The probable role of the phenomenon of self-assembling of a fractal
dust in fusion devices and outside the fusion is discussed briefly.
