Our guest this week is Dr Jon Copley. Jon is a marine biologist, specialising in the deep sea. He went on the first mini sub dive to the world’s deepest hydrothermal vents, 5km down on the ocean floor, and also took part in the firs minisub dives to 1km deep in the Antarctic.

Jon is also a science communicator and writer, who worked as a science advisor on the iconic BBC series Blue Planet II. He is also an associate professor of ocean exploration and public engagement at the University of Southampton. In 2019, he also published fantastic book called Ask an Ocean Explorer which tells you all about the ocean in 25 questions.

Over three quick-fire episodes, Jon tells BBC Science Focus managing editor Alice Limpscombe-Southwell about the bizarre life found on the ocean floor, the habitats where they thrive, and what it's like to explore the deep sea in a submarine.

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