Full Idea
Democritus says that there exist unlimited worlds and that they are different in magnitude. ...Some worlds are devoid of animals and plants and of all humidity.
Gist of Idea
There are unlimited worlds of varying sizes, some without life or water
Source
report of Democritus (fragments/reports [c.431 BCE], A010, A040) by Hippolytus - Refutation of All Heresies 1.12,13.2-4
Book Reference
Democritus: 'Early Greek Phil VII: Democritus', ed/tr. Laks,A/Most,G [Harvard Loeb 2016], p.149
A Reaction
I'm not clear why Democritus came up with the idea of the Multicosmos. I don't suppose he meant the moon or planets, but another Cosmos.
Related Idea
Idea 20920 If there were many cosmoses, each would have its own time, giving many times [Aristotle]