Once in a while, we hear that the Physics world is overjoyed with the discovery of a new elementary particle, often decades after theoretical models have predicted its existence. But Neuroscience news has a different stroke, with novel insight mainly emerging through experiments. Can theoretical approaches also provide testable predictions about how the brain works? 

Nearly all types of cancers have the potential to form metastatic growths. However, the exact moment when metastasis emerges is highly variable. While some patients develop metastatic disease soon after the primary tumour appears, others can see decades pass before it happens. What is the source of this variability?