New article on microbiome engineering published in Cell (https://www.sciencedirect.com/science/article/abs/pii/S0092867421014975?via%3Dihub) in which our project leader and microbiome engineering expert James Marsh and Ruth E. Ley address the recent Cell issue by Jin et al. (https://www.sciencedirect.com/science/article/abs/pii/S0092867421015415) and discuss innovative tools for editing complex communities and the challenges that currently remain.