In the South China Sea, near the Paracel Islands, the aqua-colored waters of an expansive shallow reef platform suddenly gives way to a near vertical shaft of vast darkness – an ocean sinkhole almost ...

Tom has a Master's degree in Journalism. His editorial work covers anything from archaeology and the environment to technology and culture. Tom has a Master's degree in Journalism. His editorial work ...

For thousands of years these underwater sinkholes remained hidden beneath the ocean. Known today as blue holes, they reveal ...

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Deep inside a remote river cave, we came across something unexpected - a glowing blue hole with no clear bottom in sight. The water was eerily still, the surroundings silent, and the mystery ...