Socotra, also spelt Soqotra, is a small archipelago of four islands in the Indian Ocean. The largest island, also called Socotra, is about 95% of the landmass of the archipelago. It lies some 240 kilometres (150 mi) east of the Horn of Africa and 380 kilometres (240 mi) south of the Arabian Peninsula. The island is very isolated and through the process of speciation, a third of its plant life is found nowhere else on the planet. It has been described as the most alien-looking place on Earth.
Socotra is part of the Republic of Yemen. It had long been a part of the 'Adan Governorate, but in 2004 it became attached to the Hadhramaut Governorate, which is in much greater proximity to the island than 'Adan (although the nearest governorate is Al Mahrah).
There was initially an Oldoway (or Oldowan) culture in Socotra. Oldoway stone tools were found in the area around Hadibo by V.A. Zhukov, a member of the Russian Complex Expedition in 2008. Socotra appears as Dioskouridou ("of Dioscurides") in the Periplus of the Erythraean Sea, a 1st century AD Greek navigation aid. In the notes to his translation of the Periplus, G.W.B. Huntingford remarks that the name Socotra is not Greek in origin, but derives from the Sanskrit dvipa sukhadhara ("island of bliss"). A recent discovery of texts in several languages, including a wooden tablet in Palmyrene dated to the 3rd century AD, indicate the diverse origins of those who used Socotra as a trading base in antiquity.
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A local tradition holds that the inhabitants were converted to Christianity by Thomas the Apostle in AD 52. In the 10th century, the Arab geographer Abu Muhammad al-Hasan al-Hamdani stated that in his time most of the inhabitants were Christians. Socotra is also mentioned in The Travels of Marco Polo, according to which "the inhabitants are baptised Christians and have an 'archbishop'" who, it is further explained, "has nothing to do with the Pope in Rome, but is subject to an archbishop who lives at Baghdad". They were Nestorians but also practised ancient magic rituals despite the warnings of their archbishop.
In 1507, a fleet commanded by Tristão da Cunha with Afonso de Albuquerque landed an occupying force at the then capital of Suq. Their objective was a Portuguese base to stop Arab commerce from the Red Sea to the Indian Ocean, and to liberate the presumed friendly Christians from Islamic rule. Here they started to build a fortress. However, they were not welcomed as enthusiastically as they had expected and abandoned the island four years later, as it was not advantageous as a base. The island was also come across by Somali sailors. The islands passed under the control of the Mahra sultans in 1511. Later, in January 1876, it became a British protectorate along with the remainder of the Mahra State of Qishn and Socotra. For the British it was an important strategic stop-over. The P&O ship Aden sank after being wrecked on a reef near Socotra, in 1897, with the loss of 78 lives.
In October 1967, the Mahra sultanate was abolished. On 30 November 1967, Socotra became part of the People's Republic of South Yemen (later to become the People's Democratic Republic of Yemen). Today it is part of the Republic of Yemen. Somali pirates have begun using Socotra as a refueling stop for hijacked maritime vessels.