'Like running a marathon - with 100 sharks on your tail': behind the scenes of Blue Planet II

Cannibal squid, submarine leaks at 450 metres and a poisonous stonefish sting ... the producers of David Attenborough's new series share stories of life and death underwaterI've spent more than 500 hours in submersibles 1,000 metres under the sea - the maximum depth technology can take us. You can't go to the toilet the whole time you're down there, so you have to hold it for 10 hours. The comms come and go, too. You'd always rather be in constant radio contact - it's not great when somebody goes quiet. But I've spent long enough down there to not get flustered, and to keep faith. Most people say they could never go down in a sub, but it doesn't bother me at all. If someone could figure out how to make a submarine I could live in and just drive around on the sea floor, I would. Continue reading...