théoriser

Tôt dans leurs histoires géologiques, Mars et Vénus sont théorisés avoir eu de grands océans d'eau.
Early in their geologic histories, Mars and Venus are theorized to have had large water oceans.
Les Grecs ont théorisés que la terre était ronde, mais ils ne savaient pas qu’elle avait un mouvement de rotation.
The Greeks theorized that the earth was round, but they did not know that it rotates.
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