Cover illustration Membraneless organelles in posterior germ plasm of early Drosophila embryo incorporate protein clusters: Tudor (red), Aubergine (blue) and Pyruvate Kinase (green). This image is a composite of 164 optical sections. Please see the article by Wahiduzzaman et al.

Cover illustration By optimising the efficiency of experimental procedures, we can minimise the lab’s environmental footprint, making research more sustainable. Read more in Penndorf and Jabs ‘A new approach to making scientific research more efficient ’ rethinking sustainability’ in this issue.