Micoorganisms are usually denser than the medium they live in, and therefore have the tendency to sediment. When they’re motile, this might not look like a big problem, but when they are not… well… they need to find a way to stay afloat. How do they do it? We are lucky to have been involved in a very interesting project led by Joseph Christie-Oleza on the sinking behaviour of cyanobacteria. It turns out that pili help cyanos stay afloat! And, surprisingly, help fend off grazers as well. The results have just been published in Nature Communications. Congrats to all and in particular to Joseph!