If completed and the consensus agrees with the grade, it would be the hardest rock climb in the world. Watch as Ghilsolfi and ...

This 12-meter rock face was located between Everest’s South Summit ... The V15 boulder problem – Silence, Flatanger, Norway ...

Rock climber Adam Ondra tells the BBC World Service's Ben James how he conquered the 'world's hardest cliff' in Flatanger, Norway. Video produced by Robert Spencer and Trystan Young. Listen to BBC ...