Image by Smith et al, subject to CC-BY 4.0 May 2017 Episode 38 Sign up to receive weekly alerts on new content from eLife Sign up Download Subscribe In this episode we hear about biofilms in bacteria, drug production, gender bias in peer review, nematode worms and how synchronising brain waves can boost memory. Protected areasA shortage of oxygen causes the bacteria Staphylococcus aureus to form biofilms that protect it from antibiotics Research Article by Mashruwala et al.Insight by Thomas and Fey. Making medicines in yeastA drug found only in an Indian plant can be produced on a large scale in engineered yeast Research Article by Pateraki et al. Is there gender bias in peer review?Female researchers are less likely to be invited to review scientific papers Feature article by Helmer et al. Death sentenceNematode worms use a pheromone to kill off unwanted males Research Article by Shi et al. Synchronising brain wavesArtificial stimulation of the brain can boost performance in certain memory tasks Research Article by Violante et al.