Given how much we seem to forget on a daily basis, it may seem strange but it’s completely true that our brains have an essentially unlimited ‘storage capacity’ for learning. A rough calculation by Paul Reber, Professor of Psychology at Northwestern University suggests that the brain can store 2.5 PETABYTES of data – that’s 2,500,000 Gigabytes, or 300 years worth of TV.

The human brain consists of about one billion neurons. Each neuron forms about 1,000 connections to other neurons, amounting to more than a trillion connections. Neurons combine so that each one helps with many memories at a time, exponentially increasing the brain’s memory storage capacity to something closer to around 2.5 petabytes – Professor Paul Reber, Northwestern University