Great things come in small packages and animals are no exception to the rule. Learn the epic survival stories of the world’s smallest animals as NATURE shines a light on these tiny heroes who have evolved extraordinary skills and achieved mindboggling feats: from a tiny sengi, considered the cheetah of the shrew world, to a hummingbird who travels thousands of miles north each year, from a small shark that walks on land to an army of baby turtles instinctively racing to the safety of the open ocean. Through vast savannahs to rocky plateaus and down to the depths of the seas, it is a great big world out there, but for these animals size does not matter.