British explorers map out 'never-ending' cave network underneath Borneo jungle5.39.217.76$ F0 S: Y% u7 l8 Y( c; Q5 {0 b
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Making a splash: Expedition leader Tim Allen inspects the 'Shower Head' - a calcium-formed funnel which transports rain water from the surface into caves underneath Gunung Mulu National Park, in Sarawak, Borneotvb now,tvbnow,bttvb4 }9 a5 ^2 @/ i& e6 l
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Leaving a mark: Andy Eavis compares his hand size to ancient prints left in Black Hands Cave |