'Greek fire' has been known for some 1,500 years, ever since it was described in contemporary histories of the Byzantine empire. It was used to save Constantinople in AD 674, when it was attacked by the Muslim fleet. But what was this ancient version of napalm? An expert in ancient metalwork and a Byzantine military historian are among those who try to come up with the correct formula.
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Ready to Watch Channel 4 UK Documentaries, Season 2011, Episode 21?