Picture an isolated fragment of rock in the Indian Ocean where a third of the plant life exists nowhere else on Earth, where cucumbers grow into 20-foot trees and bleed red sap. This is Socotra, the Galapagos of the Indian Ocean, and its deep evolutionary past is now colliding with the chaotic speed of human history.

This episode explores how a single island can be both an evolutionary lifeboat and the center of an international tug of war. We trace its origins as a continental fragment, the bizarre life that evolved in isolation, the empires its geography repelled, and the modern forces now dismantling the shield that protected it for millions of years.

• Socotra broke off the supercontinent Gondwana during the Miocene, making it a continental fragment rather than a volcanic island, which drove vicarious speciation.
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