Diving El Hierro's Submarine Volcano
"It's like descending into a dream because it gets darker as you go down", says expedition leader Mark Hannington. With researchers from across the globe he is traversing the active volcanic depths of the Atlantic. It is their mission to uncover the mysterious effects volcanic eruptions have on the world's oceans. "It gets very exciting, very intense", he says.
Maarten van Rouveroy
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