[jimkress]

Numerous researchers believe that 95 per cent of the mass of the universe is invisible, made up of 50 per cent vacuum

vacuum = a space empty of matter

How can 95% of the mass of the universe consist of 50% space empty of matter?

Must be products of government schools.

[spunkets]

I think they mean the universe is 50% vacuum, 45% dark matter and 5% matter they can find.

[eastsider]

I've decided it's just sloppy writing. What he meant to say is "95 per cent of the mass of the universe is invisible, made up of 50 per cent vacuum and 45 per cent dark matter."

[eastsider]

Or he could have meant to say "95 per cent of the mass of the universe is invisible, made up of 50 per cent vacuum and 45 per cent dark matter.