How deep do archaeologists usually dig—and why? It turns out, there’s no one-size-fits-all answer. In this episode, we explore what determines the depth of an excavation, what lies beneath the layers ...

When I was a kid, I liked to dig holes in my backyard in Cincinnati, Ohio. My grandfather joked that if I kept digging, I would end up in China. In fact, if I had been able to dig straight through the ...