Newborn sea lions open their eyes to one of the most crowded shores on Earth—and immediately have to fight to survive. | National Geographic

Lions are often seen as one of Africa's most iconic animals. Sadly, Cecil the lion was destined to become one of Africa's most famous animals too. In 2015, Cecil's demise at the hand of hunters was splashed across the media, but his story before he was killed is worthy of celebrating. Follow his life story in Cecil: The Legacy of a King, Monday at 9pm on National Geographic Wild. Big Cat Week: All day, every day from February 1st. | National Geographic UK

Watch as this hippo chases off a group of lions from the river. The hippopotamus is extremely territorial and will defend their territory from most animals, including lions and crocodiles. A hippo ran run on land at up to 50 km/h. Underwater, they can run across the riverbed at 8 km/h, which is much faster than a lion can swim. Watch Killer Safari on Fridays at 8pm on National Geographic WILD UK. | National Geographic UK