Wrangling snakes is more art than science, and the stakes are high. Get ready to go hand-to-scale and face-to-fang with cold-blooded killers.
When fight or flight instincts kick in, anything is possible, from heroic acts of bravery to narrow escapes and near misses.
A hole in Nicole's heart has led to life-threatening Eisenmenger's syndrome and her only hope of survival is a very rare heart lung transplant. Dr Jacob Fairhall uses a new technique to make Lew's brain tumour fluoresce under a special microscope.
We have always had a drive to explore. This spirit has led us to new shores, new depths and, in the last century, to new planets. As the number of mysteries remaining on Earth decreases, how will we have to adapt ourselves to explore farther in space?
These crews are in search of the ocean’s most elusive fish, the bluefin tuna. The captains all face a familiar decision: to take a long journey to increase their chances or possibly come home empty-handed.
Mt Rainier National Park, WA: Profile of the Hoary Marmot on the lookout. This image is from...National Geographic/Owen Bissell