Ask Fuzzy: What causes sinkholes?

Sinkholes can appear suddenly, often with dramatic and serious consequences.

While the ground may seem to unexpectedly collapse, the reality is that sinkholes generally develop over a period of time until the ground above simply loses support and gives way, leaving a gaping hole.

Sinkholes have appeared around the world in all manner of locations – beaches and oceans, residential gardens, motorways, even shopping centre car parks.