The coldest, the oldest, the first – the filming of the amazing BBC series broke many records for the Natural History Unit.
days filming in the field – a new record
hours diving beneath the ice – at temperatures down to -2C
dehydrated meals eaten
days at temperatures below -15C.
fur seals accompanied during filming
visit to the North Pole by Sir David Attenborough – his first time
seabirds filmed in the Bering Sea near Alaska – the greatest concentration on the planet
lifespan of the woolly bear caterpillar, the world’s most long-lived, filmed on Ellesmere Island: it freezes in winter and resumes eating after thawing in spring
weeks spent in the company of naïve Arctic wolves with no previous human contact
Adélie penguins in the Cape Crozier colony filmed during peak breeding season.
temperatures experienced during filming in Yakutsk, Siberia – the coldest city on Earth