This week's video is yet the latest from climbing's best, Adam Ondra. Coming to us from the cave that has become synonymous with the pinnacle of the sport climbing scene, Adam shows us around his latest Flatanger undertaking - Project BIG. A monstrous line, Project BIG is the king line of the Flatanger cave and stands as the last great, unclimbed project there with Ondra having previously been intimidated by its huge presence. Rumoured to be harder than Silence 9c, Jakob Schubert (trying the route alongside Adam) says he's not sure a more substantial project exists. Check out these two climbing giants taking on their biggest project to date below.