Potholes are just part of life in Philly, and now it feels like sinkholes are too. In the last few weeks, sinkholes have closed city streets, shut down a highway in Montgomery County, and maybe even derailed a freight train. Host Trenae Nuri dives into the bedrock issues causing these cave-ins with Laura Toran, a hydrogeologist at Temple University.

Here’s a geological map of Pennsylvania sinkholes. 

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