Hubble Tension from Bubble Tension: Cosmic Voids, Local and Global
  Scales
  Although the size of the cosmic void is much larger than the size of local
scales and much smaller than the size of cosmic scale, it will be shown that
they can be considered a very good representative for studying both local and
global scales. For this goal, we will first consider the cosmic voids in the
cosmic web as interconnected spherical bubbles. We will then show by heuristic
calculations that for each cosmic void we obtain different mass densities and
cosmological constants that are the same order of magnitude as the entire
universe. It will also be shown that the slight difference between the surface
tension of the bubbles may be the source of the $H_{\rm 0}$ tension between
local and global measurements. As a necessary consequence of this study is that
by examining a single cosmic void more seriously, both theoretically and
observationally, interesting possible propositions can be made to solve
important challenges in physical cosmology at local and global scales.
