Jill Heinerth is a cave diver, underwater explorer, writer, photographer, and filmmaker. She has starred on TV series for PBS, National Geographic Channel, and the BBC and has consulted on movies for directors including James Cameron. She splits her time between Florida and Canada.
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From one of the world’s most renowned cave divers, a firsthand account of exploring the earth’s final frontier: the hidden depths of our oceans and the sunken caves inside our planet More people have died exploring underwater caves than climbing Mo... SEE MORE