Greek fire was a liquid which burned fiercely and which could not be doused by contact with water. It was invented and used by the Byzantines for naval warfare. The problem is that no person living today, not even a historian or an archaeologist, knows what the true ingredients of Greek fire were. Its recipe was such a closely guarded military secret that it has been lost to history. The professor would therefore not have been able to make it for the English.
There's also another problem: Different scholars have different theories about it, but it seems probable that it was based on some form of naphtha, which is a liquid hydrocarbon mixture similar to gasoline or petroleum. The word itself comes from the Greek word for "wet." But in the film the ingredients they are given to work with are all dry, yet somehow the final product ends up wet and looking like ordinary pitch, which the medieval already knew about and used to defend castles against sieges.

Film

Timeline - Ai confini del tempo (2003)

Persone

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SerieTv

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