Exclusive: The Dangers Of Filming 'One Life'

Watch: Behind The Scenes of "One Life"

What's the most dangerous part of filming an intense nature documentary like BBC Earth Films' "One Life"? Find out in the above clip. The answer might surprise you.

BBC sent along an exclusive look at one of the behind-the-scenes featurettes from the new documentary "One Life." According to BBC, the Daniel Craig-narrated film:

...captures and celebrates the journey that all living things take from the moment they are born, to that most important of achievements - the delivery of the next generation.

"One Life" is currently on over 400 screens across the country. Find out where you can see this beautiful adventure at www.OneLifeOnScreen.com.