A former Nasa researcher says he wants to 'help humans genetically modify themselves' to create a new breed of superhumans.

Dr Josiah Zayner, 36, made headlines last month when he became the first person known to have edited his own DNA. The biochemist attempted to give himself super strength by removing a protein that inhibits muscle growth in his left arm, via an injection of DIY gene therapy. In a new interview, Dr Zayner claims we are 'slaves to the genomes we have', and believes humanity will develop into a new breed of super-strong human thanks to widespread DIY genetic engineering.