Earth from space: Mysterious, slow-spinning cloud 'cyclone' hugs the Iberian coast
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Earth from space: Mysterious, slow-spinning cloud 'cyclone' hugs the Iberian coast

This 2017 satellite photo shows an unusual cloud "cyclone" nestled up against the coastline of Spain and Portugal. Researchers are unsure what caused the strange structure's spin, but ocean eddies and an extreme heat wave likely played key roles.