As hare density increases, the quantity of these twigs decreases, forcing the hares to feed on low-quality high-fiber food.

Fiber optic cables and lasers capable of sending pulses of light down them already existed when Dr. Kao started working on fiber optics.

While urban areas are not short on fiber optic and copper cable, these physical data pipes are sometimes prohibitively expensive and difficult to run to the more remote reaches of the nation.