In this episode, Chris reveals how the world's most spectacular grasslands flourish, despite being short of one essential nutrient - nitrogen. As it turns out, the secret lies with the animals. There are the white rhinos of Kenya that create nitrogen hotspots by trimming and fertilising the grass. They are drawn to these particular points by communal toilets or 'fecal facebooks', where they meet and greet each other. In the whistling acacia grasslands of Kenya, Chris reveals the amazing relationships between termites, geckos, ants, monkeys and giraffes that make these places so rich in wildlife
2012 • Nature
On a summer’s night, there’s nothing more magic than watching the soft glow of fireflies switching on and off. Few other life forms on land can light up the night, but in the dark depths of the oceans, it’s a different story: nearly 90% of all species shine from within. Whether it’s to scare off predators, fish for prey, or lure a mate, the language of light is everywhere in the ocean depths, and scientists are finally starting to decode it. NOVA and National Geographic take a dazzling dive to this hidden undersea world where most creatures flash, sparkle, shimmer, or simply glow. Join deep sea scientists who investigate these stunning displays and discover surprising ways to harness nature’s light—from tracking cancer cells to detecting pollution, lighting up cities, and even illuminating the inner workings of our brains.
Some animals have an extraordinary ability to find their way. The dung beetle, an insect revered by ancient Egyptians, uses the sun, the moon and even the Milky Way to move its prized ball of dung in the right direction. Pigeons are often considered feeble birdbrains, but they have incredible memories that can recall several complex travel routes with amazing accuracy and they even use man-made roads and hedgerows to find the quickest way home.
Learn how rain transforms the area into a lush grazing pasture, creating an abundance of food. Moderate weather makes it harder for predators, as prey can migrate further. With plenty of food available, mating and birthing seasons have arrived.
Marine invertebrates are some of the most bizarre and beautiful animals on the planet, and thrive in the toughest parts of the oceans. Divers swim into a shoal of predatory Humboldt squid as they emerge from the ocean depths to hunt in packs. When cuttlefish gather to mate, their bodies flash in stroboscopic colours. Time-lapse photography reveals thousands of starfish gathering under the Arctic ice to devour a seal carcass. A giant octopus commits suicide for her young. A camera follows her into a cave which she walls up, then she protects her eggs until she starves. The greatest living structures on earth, coral reefs, are created by tiny animals in some of the world's most inhospitable waters.