The House of Wisdom, By Jonathan Lyons

Christopher Hirst
Friday 19 February 2010 01:00 GMT
Comments

Your support helps us to tell the story

From reproductive rights to climate change to Big Tech, The Independent is on the ground when the story is developing. Whether it's investigating the financials of Elon Musk's pro-Trump PAC or producing our latest documentary, 'The A Word', which shines a light on the American women fighting for reproductive rights, we know how important it is to parse out the facts from the messaging.

At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

The Independent is trusted by Americans across the entire political spectrum. And unlike many other quality news outlets, we choose not to lock Americans out of our reporting and analysis with paywalls. We believe quality journalism should be available to everyone, paid for by those who can afford it.

Your support makes all the difference.

Early in the 9th century, two teams of surveyors were dispatched to the Iraq desert to perform a complex series of measurements. As a result the scholarly Caliph Abdallal al-Mamun gained an accurate calculation of the world's circumference, some eight centuries before the Danish astronomer Tycho Brahe achieved the same feat.

Even more remarkably, the efforts of the two teams were dismissed as excessive by a contemporary trigonometrician: "There is another method that does not require walking in deserts." During the Crusades, the Arabs with their "highly evolved system of legal disputation" were aghast at Christian trial by ordeal. Contrasting our Dark Ages with Arabic enlightenment, Lyons explains how this disparity began to close as travellers brought Arab learning to the West.

Join our commenting forum

Join thought-provoking conversations, follow other Independent readers and see their replies

Comments

Thank you for registering

Please refresh the page or navigate to another page on the site to be automatically logged inPlease refresh your browser to be logged in