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Scientists have extracted mitochondria from a woman’s leg muscles and injected them into the vitreous fluid of her eyes in an attempt to treat severe blindness. The procedure caused no inflammation or side effects — but had a limited effect on restoring responses to light in the eyes, and did not restore the woman’s vision. The study shows that it was “relatively safe” to inject the person’s own mitochondria into the eyes, says mitochondria biologist Temurkhan Ayupov.

Nature | 6 min read

Reference: ResearchSquare preprint (not peer reviewed)

More than 50 studies on cell ageing have apparently used the wrong antibody to identify a key protein in experiments, according to a science sleuth. The latest case comes two months after Sholto David, a UK-based independent molecular biologist, identified hundreds of studies with a similar error and three months after he and another researcher spotted problems with antibody-validation images in the catalogue of one of the world’s largest suppliers, Thermo Fisher Scientific.

Nature | 8 min read

Features & opinion

Thunder generates acoustic waves that can help scientists probe Earth for hidden geological structures, such as sinkholes. Researchers used a technique called distributed acoustic sensing, which detects tiny deformations in ordinary fibre-optic cable. A disused cable that snaked underneath their campus for more than 4 kilometres acted as more than 2,100 sensors, which the team used to show that it could one day be “possible to monitor the shallow subsurface continuously, using infrastructure that is already in the ground and seismic energy that is already coming from the sky”, write geoscientists Nolan Roth and Tieyuan Zhu.

The Conversation | 6 min read

Reference: Science Advances paper

Studies of the US labour market suggest that automation has played a crucial part in increasing inequality — and this dynamic is likely to intensify with the adoption of AI, argues economist Daron Acemoglu. Acemoglu has joined thousands of economists and AI researchers in signing We Must Act Now, a statement urging policymakers and technology leaders to steer AI towards complementing, rather than replacing, human labour. “What is at stake is not only shared prosperity, but also our democratic system,” he writes. “Societies cannot remain stable if large numbers of people are excluded from economic opportunity.”

Nature | 7 min read

Marine heatwaves and nutrient-rich agricultural pollution are creating an ecological paradox: wild kelp forests are dying off, but floating seaweeds and microalgal blooms are multiplying. Symptoms include sargassum smothering Atlantic shorelines — and releasing hazardous sulfide as it decays — and ‘dead zones’ caused by oxygen-depleting algal blooms. Local authorities are fighting back with seaweed-thwarting offshore barriers and trawlers, and kelp-forest restoration efforts are happening around the world.

Sierra | 6 min read

Technology to help people walk, run and jump is moving rapidly from labs to hiking trails. These exoskeletons look very different from the huge mech suits of science fiction, and as the technology continues to develop they might become part of everyday life sooner than you think.

Nature | 3 min video

On Friday, Leif Penguinson was bobbing along a river in El Gallineral Park in Santander, Colombia. Did you find the penguin? When you’re ready, here’s the answer.

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