Jan te Nijenhuis studied at Groningen University and worked at his Ph.D. at the Free University of Amsterdam and at the Dutch Railways. He collaborates with researchers from US, UK, Ireland, Norway, Sweden, Denmark, Finland, Estonia, Germany, Russia, Ukraine, Portugal, Croatia, Cyprus, Saudi Arabia, Libya, Israel, Palestine, Egypt, Yemen, Somalia, Brazil, South Africa, South Korea, Japan, China, and the Netherlands. Nijenhuis has worked as a science writer, creating 47 professional publications. He received a scientific prize for his master thesis and for his Ph.D. thesis. His research on declining genetic intelligence with Michael Woodley and Raegan Murphy in 2013 received an enormous amount of attention in the popular press all over the world and led to TV interviews in France, Germany, the Netherlands, the US, and on Al Jazeera. He reviews for two dozen journals and is a member of the editorial board of the multidisciplinary journal Intelligence (2006-present).