Greek authorities are searching for Michael Mosley, a well-known British journalist and TV presenter who went missing while on a walk on the island of Symi. His wife reported him missing, and a search involving the local fire service and volunteers is underway. Mosley was last seen by a witness at a bus stop and did not have his cellphone with him. Authorities speculate that he may have succumbed to the heat or fallen in the rugged terrain. Mosley is a former doctor turned documentary maker and science journalist, known for his work on diet and intermittent fasting. He has produced and presented for the BBC and Channel 4, and is renowned for his health-related content.