Unknown Unknowns: The Problem of Hypocognition - Scientific American Blog N

In 1806, entrepreneur Frederic Tudor sailed to the island of Martinique with a precious cargo. He had harvested ice from frozen Massachusetts rivers and expected to make a tidy profit selling it to tropical customers. There was only one problem: the islanders had never seen ice.
Unknown Unknowns: The Problem of Hypocognition - Scientific American Blog N