A look at what would cause a ferocious tiger shark to cuddle up with a diver and why pigs are swimming in the Caribbean; and what mysterious blobs have washed up by the thousands on the shores of Oregon.
Richard Hammond continues his exploration of weird and wonderful animal abilities by focusing on super-senses, and discovers how those same animal senses have inspired some unlikely human inventions. Richard gets buried in a Californian gold mine, attempts to talk to a rattlesnake by telephone, and is taken for a ride by a monster truck that drives itself. Along the way, he encounters elephants who can talk to each other through solid rock; seals who use their whiskers to sense the shape, size, speed and direction of an object that passed over thirty seconds earlier; and a blind cyclist who relies on fruit bats to get him safely down a twisting mountain bike trail.
Part 2: Visitors David discovers the creatures that visit the reef every year, from birds to whales, some travelling thousands of kilometres to get there. Using the latest technology, David dives into the shark-infested waters of Osprey Reef in the Triton submersible. Sixty years after his first visit to Raine Island, he returns to the nesting grounds of the green sea turtle and at Lady Elliot Island marvels at manta ray cleaning stations. New tracking technology allows David to follow the story of visitors like the dwarf minke whales. Stunning satellite imagery and computer animation reveal their journey and David discovers their surprising reasons for returning and why the reef is vital for their survival.
Grasslands cover one quarter of all land and support the vast gatherings of wildlife, but to survive here animals must endure the most hostile seasonal changes on the planet. From Asia's bizarre-looking Saiga antelope to the giant anteaters of Brazil, grassland animals have adapted in extraordinary ways to cope with these extremes. In the flooded Okavango, lions take on formidable buffalo in epic battles, on the savannah bee-eaters take advantage of elephants to help catch insects and, on the freezing northern tundra, caribou embark on great migrations shadowed by hungry Arctic wolves.
Jungles provide the richest habitats on the planet - mysterious worlds of high drama where extraordinary animals attempt to survive in the most competitive place on earth. Flooded forests are home to caiman-hunting jaguars and strange dolphins that swim amongst the tree tops, while in the dense underworld, ninja frogs fight off wasps and flying dragons soar between trees. Acrobatic indri leap through the forests of Madagascar, while the jungle night conceals strange fungi and glow-in-the-dark creatures never filmed before.