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Mass Cuttlefish Aggregation a Must-Dive Event in Australia

Hundreds of cuttlefish gather near Whyalla, South Australia, each year to mate in the world's largest cuttlefish aggregation.

Diving Down Under: Australia's Olwolgin Cave System

What dive is worth camping out in the Nullarbor desert, 500 miles from the nearest town? An exploration of Australia's immense Olwolgin cave system.