Wild

Join conservation biologist Zeb Hogan in his quest to find and help the biggest freshwater fish in Brazil.

Megafish follows the quest National Geographic Explorer and Aquatic Biologist Dr. Zeb Hogan, on his search for the world's largest freshwater fish.

On Christmas Day 2007, a 243-pound Siberian tiger named Tatiana escaped from her open-air enclosure at the San Francisco Zoo and mauled three young men. Before long, one 17-year-old boy and the 4-year-old tigress lay dead. Zoo Tiger Escape investigates the how and why of what really happened that night-from the possible motivational factors that led the tiger to escape, to the complex evolution of enclosure design.