Boats are pictured at Qalansiyah on the west of the Yemeni island of Socotra, the second biggest settlement on the Indian Ocean archipelago, which is named by the UN as a World Heritage site as one of the most biodiversity rich and distinct islands in the world, on April 15, 2021. - The archipelago's remote location helped it forge its astonishing nature millennia ago - a third of the main island's plants are unique, from bulbous bottle and cucumber trees to alien aloes. But the 130 Km (80 mile) long island also oversees busy global shipping lanes at the crossroads between Africa and the Arabian Peninsula. (Photo by Peter MARTELL / AFP)