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Microbiologists have uncovered a sneaky trick by the bacterium Pseudomonas aeruginosa to oust rivals. It deploys a toxin delivery machine to breach cell walls of competitors without hurting itself. Its means of attack helps it survive in the outside environment and may even help it cause infection.

A one-dose method for delivering gene therapy into an arterial wall in rabbits effectively protects the artery from developing atherosclerosis despite ongoing high blood cholesterol. In the future, researchers hope to test whether this gene-delivery method works in heart bypass grafts.

Trees absorb carbon dioxide from the atmosphere to grow, so forests have long been proposed as a way to offset climate change. But rather than just letting the forest sit there for a hundred or more years, the amount of carbon dioxide taken out of the atmosphere could be quadrupled in 100 years by harvesting regularly and using the wood in place of fossil-fuel intensive steel and concrete.

Sodium channels are pores in the membranes of excitable cells – such as brain nerve cells or beating heart cells – that emit electrical signals. Researchers have obtained a high-resolution crystal structure showing all the atoms of this complex protein molecule and how they relate in three-dimensions.