What happens as you dive further and further into the dark ocean?

Join Blue Peter Science presenter and YouTuber Greg Foot for the story of his scientific adventure to the deep. With experiments and stunning videos, Greg will show you the high-tech submersibles that took him down a crazy 1000ft into the Twilight Zone. He’ll explain the importance of our oceans, and thanks to Greg’s work with the Blue Planet II team - uncover the effect we’re having on them.