Thijn Brummelkamp is an energetic, critical and entrepreneurial scientist researching the function of each of the approximately 25,000 genes in the human body. He began by developing a way to turn off each of these genes one by one. Then he invented an even smarter method to do the same with a number of genes at the same time. Thijn Brummelkamp is a Biomedical laureate of the Ammodo KNAW Award 2015.