A British-led team of divers have surfaced after diving a world record-breaking 8.8km (5.5 miles) into the unexplored Pozo Azul cave system in Spain.
Explorers Jason Mallinson, Rick Stanton and John Volanthen, along with Dutch caver Rene Houben, charted new territory in a 50-hour voyage which saw them spend two nights camped deep underground.
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