Communication of information between neurons is accomplished by movement of chemicals across a small gap called the synapse. Chemicals, called neurotransmitters, are released from one neuron at the presynaptic nerve terminal.
Follow Trail 12 until it runs back into trail 1 and familiar sights and then you are only about 200 yards from the great Cumberland Falls. To the best of my guessing ability I would say this loop was about 8.5 miles long which took us about 3 hours and 45 minutes.
Geologists estimate that the rock over which the Cumberland River plunges is about 250 million years old. Romantics are enchanted with the poetic beauty of the falls. Visitors are awed by the majesty of the falls. Historians note the uniqueness of the site.