Dr Helen Czerski examines the hottest natural phenomena on the planet - lightning. Bolts of lightning five times hotter than the surface of the sun strike our planet over 3 million times every day - and yet we still know little about this deadly force of nature. Now, specialist photography is revealing how lightning travels through the air, high-speed cameras are unlocking the secrets of upward lightning that's triggered by our urban landscapes, and scientific expeditions are capturing rare images of intense electrical discharges over 80 kilometres wide.
Professor Brian Cox follows Earth's epic journey through space. He takes to the air in a top-secret fighter jet to race the spin of the planet and reverse the passage of the day. In Brazil, a monstrous wave that surges up the Amazon River provides an epic ride of a different kind - chased by a top surfer through the rainforest, this tidal wave marks Earth's constant dance with the Moon. Greenland experiences some of the biggest swings in seasons in the world, but despite the deep freeze, the harsh winter brings opportunity to the Inuit people who live there. All this spectacle here on Earth signals that we are thundering through the universe at breakneck speed. Brian explains why we can't feel it and how understanding motion brings us to understanding the nature of space and time itself, leading to the astonishing conclusion that the past, present and future all exist right now.
They cannot tolerate sunlight; some of them are even blind. However they are one of the world's most ingenious builders: Termites. They build high-risers that are, relatively speaking, 25 times higher than the Empire State Building in New York. They are the only animals that have managed to build an air-conditioning system without electricity. Their nests are architectural masterpieces that rise up to eight meters from the ground and contain brood chambers for larvae, corridors for transportation and fungal gardens for nutrition. Termites - The Inner Sanctum takes us along a journey into another world. Visit the skillfully built termite mounds in the savannah, termite nests in the tropical rainforest with their colossal columns of termites foraging for food - and the termites that wreak terrible damage to wood-framed homes. Filmed in the US, Kenya and Borneo.
2011 • Nature
Kamuti the leopard has reigned supreme over her corner of the Luangwa Valley for 10 years. She's defended her territory, hunted antelope for food, and even kept the nearby pride of lions at bay. But a younger leopard is determined to replace her. Can she survive one more challenge, or will this be her last stand?
Steve Backshall lifts the lid on an incredible world of intricate relationships and unexpected hardship in the Amazon rainforest, explores the way that the jungle's inhabitants interact, and reveals a hidden secret that might just be what keeps the whole place alive.