"Links between diet and disease are also emerging. Excessive levels of junk food appear to ‘turn off’ pleasure centres in the brain in mice, such that they eat more and more and become obese. A second project appears to have established a link between alcohol and impaired stem cell production, thereby reinforcing the danger of overconsumption or dependence. Links between too much TV at a young age and impaired brain development are a growing concern, such that the Australian Government is considering banning TV targeted at toddlers . Use of the internet on the other hand, may have a positive effect on our brains according to another project. The brains of new internet users showed significant changes within a week with greater activity in those areas used for decision making and memory . " - Lyn Jeffery