Microarrays let scientists analyse DNA from many thousands of tumour samples simultaneously, to find the most frequent changes that are more likely to be the culprits. Many scientists are trying to use computer software to trawl through the huge amounts of data generated to spot the precise location of copy number changes, but in many cases these are not accurate enough. The human eye is still the best technology we have for picking up these patterns, and Play to CureTM: Genes in Space is harnessing this power.