Mysterious Sinkholes of Mt Baldy
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In 1795, a farm boy named Daniel McGinnis found a strange depression in the ground on an island in Nova Scotia's Mahone Bay. As he and his friends began to dig, they realized they'd stumbled on much more than an ordinary hole. Tune in and learn more.
Geologists and biologists have recently realized that the planet’s oceans and coasts are littered with a unique type of ecosystem called blue holes, submerged sinkholes that were once dry caves. They are turning out to be weird and amazing places.