Health Correspondent Paul Cullen is Health Correspondent with The Irish Times.
A reporter with many interests but few obsessions, he has previously covered politics, consumer affairs, the developing world and education.
The Abbasids, of great intellectual curiosity, adapted elements of earlier high cultures and incorporated them into their own.
in which the proportion of carbon isotopes is counted directly (as contrasted with the indirect Geiger counter method) using an accelerator mass spectrometer.
The method drastically reduces the quantity of datable material required..
The throne then passed to Darius, who set up an efficient administration of an empire then extending from the Nile to the Indus.
This empire united for the first time all the peoples of the east -- from Thrace and Egypt to the Aral Sea and the Indus Valley -- and had as its capitals Parsargadae, Susa, and Persepolis.
At Marathon in 490 , Darius failed to conquer the Greeks, as his son Xerxes failed at Salamis in 480.Their successors, notably Artaxerxes, fought to consolidate a waning empire. The period is an important one in Iranian civilization.CATEGORY: culture DEFINITION: The second of two Arab dynasties of the Muslim Empire of the Caliphate (caliphs = rulers) and descended from al-Abbas, uncle of the Prophet Muhammad.It overthrew the Umayyad caliphate in AD 750 and was based in Baghdad until 1258 when it was sacked by the Mongols.The end of the Umayyad dynasty meant a shift in power from Syria to Iraq.The Abbasids' settlement in Baghdad marked the beginning of the golden age of Arabic literature.