“Instead, researchers believe memories form in the connections between neurons and across neural networks. Each neuron sprouts extensions like train lines from a commuter hub, looping in about a thousand other nerve cells neurons. This architecture, it is thought, makes the elements of memories available across the whole tangled web. As such, the concept of a blue sky, say, can show up in countless, notionally discrete memories of outdoor scenes.
“Reber calls this effect “exponential storage,” and with it the brain’s memory capacity “goes through the roof.” ”
http://www.bbc.com/future/story/20150401-whats-the-most-we-can-remember
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