625,000 4GB memory cards is the ‘answer’ – which stacked on one another would be a tower just under 6 miles high! Human brain memory storage “equals” around 2.5 petabytes. That’s the huge amount of memory that Paul Reber, professor of psychology at Northwestern University in the US, has come up with in considering the size of the brain’s memory storage capacity. It’s all to do with the one billion neurons and the trillion connections between them, with each neuron…