Mar 01 2018 30 mins 1
By the beginning of the 1800s, Bell Rock in Scotland’s Firth of Forth was responsible for wrecking numerous ships each winter. It was clear to everyone that sailors needed to be warned. But since the Rock was miles from shore and submerged by the sea for all but two hours a day, experts thought it would be impossible to build a lighthouse there. For Robert Stevenson, the challenge would become an obsession.
