Full Idea
Once the vault of the universe has gathered the four bodies [elements] together inside itself, it compresses everything and and squeezes out every last bit of void, because, being spherical, it is in its nature to want to close itself.
Gist of Idea
The spherical universe composed of four elements squeezes out every bit of void
Source
Plato (Timaeus [c.362 BCE], 58a)
Book Reference
Plato: 'Timaeus and Critias', ed/tr. Waterfield,Robin [OUP 2008], p.53
A Reaction
Notice the explanation by 'its nature'. This thought is in opposition to the atomists, who needed a perfect void to explain the movement of the atoms. Maybe the fields of modern physics squeeze out any void?