Amabel Adcock

Over two extraordinary years, National Geographic Explorer Bertie Gregory discovered never-before-filmed secret traditions, surprising intelligence and close-knit societies of penguins. This astonishing series reveals they are more like us than we ever dreamed, from their powerful friendships to the courageous risk-takers using ingenuity and innovation in some of the world's most extreme places.

Unlock the killer secrets and ingenious tactics of nature's toughest fighters in four incredible ecosystems around the world. Wild gladiators, from the smallest ants to the biggest bears, do battle for the ultimate prize: survival.