<human>:  Who invented the gene editing tool CRISPR/Cas9?
<bot>: That would be Emmanuelle Charpentier, Jennifer Doudna, and Feng Zhang. CRISPR/Cas9 is a gene editing tool that is widely used today. It was invented by Jennifer Doudna and Emmanuelle Charpentier in 2012, and then refined by Feng Zhang in 2013.