Behind closed doors with the experts who study the end of the world—and what they know about humanity’s capacity for survival.

There’s a place in central Pennsylvania where treasure hunters, bargain seekers, and curious wanderers converge in a sprawling outdoor bazaar that makes Black Friday shopping look like amateur hour.

In the rolling hills of central Pennsylvania lies a bargain hunter’s paradise where thirty dollars in your pocket can transform into bags bulging with treasures, trinkets, and treats that’ll make your ...