That's when sea levels began to rise, and the cave flooded and collapsed, leaving behind the Blue Hole we see today. Researchers think that other marine sinkholes, like Dragon Hole in South China ...
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Disturbing discovery made at the bottom of Belize's Giant Blue Hole“As for the mythical monsters ... Blue Hole is made of a complex system of caves that once formed on dry land. It is proof of how oceans can rise quickly and catastrophically. “Sea levels ...
Plunge into this deep blue hole and you'll discover ... lining the coral wall at the surface of the hole. As you descend about 410 feet below sea level, you'll discover the stalactites, but ...
Like a pinprick piercing the azure Caribbean Sea, the Great Blue Hole is as mysterious as it is mesmerizing. From above, this almost perfectly circular underwater sinkhole is a deep, dark bullseye ...
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