Watch full episodes of the Science Channel Series "How It's Made." This is how rope is made. These ropes are made from thousands of nylon fibers that are finer than human hair, but stronger.

They use traditional methods, and 150-year-old equipment to make 500,000 pounds of rope each year. Ropemaking is a simple process of twisting fibers together to create an extremely strong cable ...

As much as we would like our climbing ropes to last forever, they do have an 'expiration date.' According to experts at REI, the general guidelines for rope ret ...