Traditional lap pools are about 10 feet wide, though widths between 8 and 10 feet are common. (In competition pools, swim lanes are 2.5 meters wide, or about 8.2 feet.) You don't want to go too narrow with a lap pool.
The number of neurons in the brain varies dramatically from species to species. One estimate (published in 1988) puts the human brain at about 100 billion (10 11) neurons and 100 trillion (10 14) synapses.
What do we know about the inner workings of the human mind? Surely everything that humans do from designing skyscrapers to composing symphonies... is not the product of simple cellular interactions. And yet it might be...because everything that humans do (or think or feel) is the result of the basic units of brain structure - the neurons. The human brain contains more than a hundred billion neurons. Just like a single ant could never build an anthill, a single neuron can't think or feel or remember. A neuron's power is a result of its connections to other neurons.