Puerto Rico: Island of Enchantment

David Attenborough narrates the story of Rodrigo Medellin, Mexico's very own 'Bat Man', who has dedicated his life to saving bats. Now the legendary drink tequila is also at stake.

NOVA: Extreme Animal Weapons From lobster claws and dog teeth to bee stings and snake fangs, every creature depends on a weapon. But some are armed to extremes that make no practical sense - whether it's bull elks with giant 40-pound antler racks or tiny rhinoceros beetles with horns bigger than their body. What explains giant tusks, horns and claws that can slow an animal down and even impair health and nutrition? Showcasing astonishing wildlife cinematography, Extreme Animal Weapons investigates the riddle of outsize weaponry and uncovers a bold new theory about what triggers an animal arms race. In creatures as varied as dung beetles and saber-toothed tigers, shrimp and elephants, the same hidden factors trigger the race and, once started, these arms races unfold in exactly the same pattern. In this enthralling special, NOVA cracks the secret biological code that underlies nature's battleground.

This nature series’ new technology lifts night’s veil to reveal the hidden lives of the world’s creatures, from lions on the hunt to bats on the wing.

Utilizing the latest scientific innovations and leading-edge filmmaking technology, this documentary reveals the secret powers and super-senses of the world’s most extraordinary animals, and invites viewers to see and hear beyond normal human perception to experience the natural world as a specific species does — from seeing flowers in bee-vision to eavesdropping on a conversation between elephant seals to soaring the length of a football field with glow-in-the-dark squirrels.