Nature - Season 45

Join Elmo and the Sesame Street gang on a once-in-a-lifetime African safari adventure. After adopting an orphaned elephant online, Elmo, Abby and Nina decide to travel to The Sheldrick Wildlife Trust in Kenya to meet the young elephant and the keepers who care for her.

In the forests of western Nepal, a team of cinematographers and big cat experts undertake an expedition to follow the lives of two tiger mothers and reveal how these solitary cats are raising cubs on an island full of threats. By using a fleet of drones to track tigers from the air, and military-grade thermal cameras to follow them in the dark, the team witnesses tiger behavior that has never been recorded before.

In Nepal, the crew uses thermal cameras to film tigers at night, revealing previously unseen behavior. A new tiger mom must keep her growing cub out of trouble, while another tigress' cubs are stalked by the returning male 'king' of Tiger Island.

On the southern edge of the Sahara in Fongoli, Senegal, lives a group of remarkable chimpanzees that could hold clues to how we became human. The Fongoli chimps live at the very limits where chimps can survive, having adapted to the extreme heat and dryness of the savanna woodlands. For years, these chimps were elusive ghosts, rarely seen. NATURE traces the remarkable 25-year story of how American anthropologist Jill Pruetz and local chimp expert Dondo Johnny Kante got so close to the Fongoli chimps to uncover unique behavior

In the Alps, December transforms the mountains and valleys into a winter wonderland. Spruce and fir forests glisten with sparkling frost as goldcrests dart across in search of their feast. Marmots retreat to cozy underground homes, chamois race across the highest peaks, while deer and wolves trot through deep snow. Catch a glimpse into the Alps' most enchanting time of year.