An investigation into the greatest man-made structures of all time, exploring how new materials and construction techniques have allowed engineers, builders and architects to work to the limits of their ability.
Follow the further icy adventures of Life Below Zero’s resilient characters as the series charts their day-to-day lives in Alaska.
In an increasingly unpredictable Arctic climate, they must quickly adapt to the changing landscape in their quest for freedom and survival.
Sue is preparing herself for an increasingly uncertain future. Jessie and his dog team are getting ready for their second 1,000-mile Iditarod sled race. Meanwhile, unusual weather conditions are hampering the Hailstones’ harvest of vital resources.
Andy continues to teach Denise essential bush survival skills. And Ricko shows his children the importance of carrying on the Athabaskan way of life.
From the smallest creature under the microscope to the limitless expanses of space, BBC Earth brings viewers face-to-face with heart-pounding action, mind-blowing ideas and the wonder of being human.