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S50-E5 Horizon: Swallowed by a Sink Hole

S50-E5 Horizon: Swallowed by a Sink Hole

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“I want to find out why sinkholes form,” says Iain Stewart, in the faux-innocent way of Horizon presenters. He knows perfectly well how they form, of course: he’s a professor of geology, for heaven’s sake. And by the end of a crisply informative edition, we will, too (it’s to do with clay bridges in the soil over voids in the underlying rock, since you ask).

But first, we’ll hear some shocking personal testimony about these giant trapdoors that can open up without warning and swallow entire homes. Florida is the sinkhole capital of the world because the whole overdeveloped state is built on limestone that is dissolved, little by little, every time it rains.


in February, 2013, Jeff Bush was asleep at his home in Florida when a sink hole opened up beneath his bedroom. Despite the efforts of his brother to rescue him, Jeff was never seen alive again and his body could not be recovered. Professor Iain Stewart travels to the American state to discover what took Jeff's life and investigate why the geology of the area makes it the sinkhole capital of the world.

Cast & Crew

Presenter Iain Stewart
Director Ed Booth
Producer Ed Booth
Series Editor Aidan Laverty

Documentary Science

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