A team of explorers descend into the Thrinukagigur crater to study the inner workings of Icelandic volcanoes.
Take a look to see how lava shapes our planet.
World's Wildest Encounters
Amazing images from inside the Giant Crystal Cave
Prehistoric Predators Photo Gallery
Brady Barr has an encounter with a sawfish.
Dr. Brady Barr Works to create a robot that can help capture deadly snakes.