A Korean satellite has caught an eye-catching view of an island in Mexico for a deep, rocky hole and waters so dark that they earned it the name Holbox―a name that means “black hole.” The photo was taken by the Korea Multi-purpose Satellite 2, or Kompsat-2, and show Holbox Island and its Yalahou lagoon at the northeast corner of Mexico’s Yucatan Peninsula. The photo was revealed in the science...