Our planet was once populated by megafauna, big top-of-the-food-chain predators that played their part in balancing our ecosystems. When those megafauna disappear, the result is a "trophic cascade," where every part of the ecosystem reacts to the loss. How can we stay in balance? George Monbiot suggests rewilding: putting wolves, lions and other predators back on top -- with surprising results.
David Harewood narrates a documentary exploring three of the most exotic and remote islands on the planet, beginning with the unique and extraordinary wildlife of Madagascar. As the oldest island on Earth, life has had time to evolve and there are now more unique plants and animals on Madagascar than any other, with footage of ring-tailed lemurs, labord's chameleons and Decken's sifakas.
Human mothers raise fetuses inside their wombs and breast feed their babies for a long time after birth. What made humans evolve so that we raise our children so affectionately? The latest research reveals an unexpected origin of mothers' affection toward their children. Scientists believe that our ancestors experienced unforeseen dramatic changes in DNA under threats of extinction. These DNA changes caused humans to be devoted to raising children. Learn about the scientific interpretation of the evolutionary roots of your affectionate bonds with your kids.
Every year, the painted lady butterflies undertake a mysterious migration. This discreet journey covers thousands of kilometers and triggers puzzles that scientists are still trying to understand today. Thanks to cutting-edge technology, we will track the butterflies on their journey.
In New Zealand the travellers make their way through one of the most dramatic landscapes in the world. They are on a journey to find the last remaining kakapo, a fat, flightless parrot which, when threatened with attack, adopts a strategy of standing very still indeed.