Riddle of the Ancient Rhino
S1, E5: In the Cagayan Valley, archaeologists uncover the remains of an ancient rhinoceros and a thriving population of deadly vipers on a Brazilian island poses a formidable challenge.

S1, E5: In the Cagayan Valley, archaeologists uncover the remains of an ancient rhinoceros and a thriving population of deadly vipers on a Brazilian island poses a formidable challenge.