One of the greatest technical revolutions of the 21st century is not digital but biological. A breakthrough called CRISPR has given us unprecedented control over the fundamental building blocks of life. It opens the door to curing diseases, transforming the biosphere and shaping our own children. But, of course, the use of the “common gap” also raises many questions, not least of ethical nature. Where are the limits? And where do we set limits, when there are almost none? The documentary “Human Nature” teaches the basics of genome research and then looks at the possible consequences of using CRISPR – both positive and negative. The speakers include scientists who have discovered the revolutionary technology, families affected by the new opportunities, and bioengineers who are exploring their limits.