Sub-atomic particles having zero rest mass. Universe, an infinitesimally thin sheet?

.... mass itself an emergent product?

I read in New Scientist of 3 February 2001, article 'Mass medium' pp. 22-25, in page 25 excerpt titled 'Mass delusion'

"Most theories that attempt to unify the forces of nature, showing them to be facets of a single "superforce", treat all subatomic particles as having zero rest mass. So they need an extra ingredient-the Higgs boson."

Sub-atomic particles having zero rest mass? Sub-atomic particles? What our universe is made up of? Having zero mass? Mass which fills the universe? What makes it appear to us, as an enormous void full of massive objects? Compact, solid? But the stuff of these massive objects, the sub-atomic particles, have zero rest mass?

So, the whole universe can easily fit in a sheet of infinitesimal thickness?

As what I thought in "Observer to Planck length distance, fractal? Why we perceive continuity, out of the energy packets (quanta), the physical world is made out of?", post

"For any effect, the world we live in, the reality for us, might unravel in infinite fractal dimensions inside thin sheets, as thick as A4 paper."