Signals can travel around the Earth seven times in one second.

Signals in a computer can travel no faster than light.

Furthermore, the signals you send or receive must travel about 22,300 miles each way.

A signal to trigger an explosive could travel far in that time.

"Signals at these frequencies travel further and more easily through walls."

As a result, signals don't travel very far and antennas generally must be within five or six miles of one another.

"Right now, a signal is traveling to Houston," the site informed me.

Now calculate exactly how far an omnidirectional signal would travel in the time since.

These signals then travel to the brain's auditory center, where the message is processed.

Signals travel in a straight line, so those from towers have a limited range on the curved surface of the Earth.