Silence

Silence (also Project Hard), is a overhanging sport climbing route in the granite Hanshelleren Cave, in Flatanger, Norway. When Czech climber Adam Ondra made the first free ascent on 3 September 2017, it became the first rock climb in the world to have a proposed climbing grade of , and it is an important route in rock climbing history. To complete the route, Ondra undertook specialist physical and mental training to overcome its severely overhanging terrain.