9news.com.au
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Expedition into Belize Blue Hole could unlock ancient Mayan secrets
9news.com.au
A world-first submarine expedition, involving billionaire Richard Branson, will explore the darkest depths of Belize&#39;s Blue Hole, using military-grade sonar to map the sinkhole&#39;s vast underwater interior in wondrous detail. Situated 70km off the Belize ...




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