<From about 700 to 1700, many of history's finest scientists and technologists were to be found in the Muslim world.
In Christian Europe the light of scientific inquiry had largely been extinguished with the collapse of the Roman empire. But it survived, and indeed blazed brightly, elsewhere.
From Moorish Spain across North Africa to Damascus, Baghdad, Persia and all the way to India, scientists in the Muslim world were at the forefront of developments in medicine, astronomy, engineering, hydraulics, mathematics, chemistry, map-making and exploration.
A new touring exhibition, hosted by the Science Museum in London, celebrates their achievements.
There is one big question the exhibition does not address: why, after so many centuries, did the Muslim world's scientific leadership falter? From the 16th Century onwards it was in Europe that modern science developed, and where scientific breakthroughs increasingly occurred.
Prof Al-Hassani has his own theory, though there are others. Science flourished in the Muslim world for so long, he believes, because it was seen as expanding knowledge in the interests of society as a whole.
But in the later Middle Ages, the Muslim world came under attack from Europeans (in the Crusades) and the Mongols (who sacked Baghdad in 1258) and the Ottoman Turks overran the remnants of the Byzantine empire, setting up a formidably centralised state.
The need for defence against external enemies combined with a strong centralised government which put less value on individuals' scientific endeavour resulted in an intellectual climate in which science simply failed to flourish, he says. >
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