An American man who went on a solo-hike has gone missing from a Greek island just days after Michael Mosley vanished in similar circumstances. Eric Calibet, 59, a retired police officer, embarked on a challenging four-hour hike on the island of Amorgos, from Aegiali to Katapola, at around 7am local time according to residents. When he had not returned eight hours later, a friend reported him missing to the police. Authorities have not been able to contact Calibet via either of his two cell phones. His disappearance comes just days after television doctor Mosley died on the neighbouring island …