Cave diving may be the most dangerous of adventure sports. But it also an area where true exploration, going where no one has gone before, is still possible. This Australian team, led by diving physician Richard Harris, is searching for the source of a river that emerges from a cave on New Zealand South Island. While in pursuit of the waterway origin, diver Craig Challen set a new depth record 194 meters or 636 feet. See how the divers deal with the extreme and sometimes deadly conditions in this video.
The 1970s brought about sufficient advances in rubber, plastics, synthetics, and adhesives that allowed for new methods of shoe manufacturing. Soles that once had to be machine stitched could now be easily glued on. These simpler crafting techniques led to the creation of the modern shoe. Since then, shoe companies have had over thirty years to improve upon their original designs. Logically, one would assume that shoe related problems today would be nearly non existent, but according t