The ancient ancestors of today's Maya people thrived in large, sophisticated cities across Central America for centuries. Why, around 750 CE, did they begin to abandon many of their major cities? Archaeologists investigate dramatic new evidence of the catastrophic droughts and instability that pushed cities beyond their limits. The evidence also testifies to the survival and resilience of the Maya people, whose traditions and creativity continue to enrich the world today.

Scott Burnett is "Scatman"—an Australian ecologist on the trail of the secrets of poop. By identifying and analyzing animal scat for DNA and hormones, he discovers essential details of their behavior, how they fit in the ecosystem, and even how to protect them. From the mysterious cubic poop of wombats to the precious pink waste of whales, join scientists as they explore nature's smelliest secrets.