Full Idea
Archelaus was the first person to say that the universe is boundless.
Gist of Idea
Archelaus was the first person to say that the universe is boundless
Source
report of Archelaus (fragments/reports [c.450 BCE]) by Diogenes Laertius - Lives of Eminent Philosophers 02.Ar.3
Book Reference
Diogenes Laertius: 'Diogenes Laertius', ed/tr. Yonge,C.D. [Henry G. Bohn 1853], p.63