The next time you look in a mirror, think about this: In many ways you're more microbe than human. There are 10 times more cells from microorganisms like bacteria and fungi in and on our bodies than there are human cells.
The Mackenzie Delta is an Arctic network of channels and islands at the mouth of Canada's largest river. It's home to the ancient Inuit, as well as a variety of highly specialized wildlife, including the sonorous sandhill and majestic peregrine falcon. Follow them as they contend with a rapidly changing climate.
David Attenborough looks at the mammals that hunt insects. These creatures shared the planet with the dinosaurs, but when the giant reptiles disappeared they seized their chance to conquer new territory. David meets moles that swim through sand, a shrew that hunts underwater and another that sprints down polished running tracks so fast that most predators can't catch it.
To say some baby animals are dependent on their parents is an understatement. At Caversham Wildlife Park in Australia, a koala joey can always be found clinging to its mom's body, and Asian small-clawed otter pups share a lifetime family bond. Enjoy a heart-warming look at mother-baby animal relationships.
At first glance, they look like pigs, but they're actually white-lipped peccaries from the Brazilian wetlands of the Pantanal, 10 times the size of the Everglades. Follow scientists as they track these mysterious mammals in their daily quest for food, while keeping a watchful eye for their main predator: jaguars.
Few places on earth evoke more mystery and romance than Arabia. This enters the forbidding wilderness and reveals a magical cast of characters. From the snow-white oryx that inspired the myth of the unicorn to the long-legged jerboa leaping ten times its own body length through the star-filled Arabian nights. Horned vipers hunt glow-in-the-dark scorpions, while Bedouin nomads race their camels across the largest sand desert in the world.