<h2>00:46 Millimetre-sized pacemaker fits inside syringe</h2>Researchers have developed a tiny, temporary pacemaker that dissolves when no longer needed, helping to overcome some of the challenges associated with current devices. Temporary pacemakers are often required after heart surgery but implanting them can require invasive procedures. This new device is injectable, requires no external power and is controlled using light shone through the skin. The tiny pacemaker has shown promise in animal and heart models, and the team think it could also be used in other situations where electrical stimulation is needed, like the brain.Research Article:&nbsp;<a href="https://www.nature.com/articles/s41586-025-08726-4" rel="noopener noreferrer" target="_blank">Zhang et al.</a><h2>08:19 Research Highlights</h2>Measurements show that global warming is causing lakes to lose their oxygen, and a massive, 30-year analysis showing that a diet of plant-rich foods is associated with healthy ageingResearch Highlight:&nbsp;<a href="https://www.nature.com/articles/d41586-025-00876-9" rel="noopener noreferrer" target="_blank">Life-giving oxygen is wafting out of lakes worldwide</a>Research Highlight:&nbsp;<a href="https://www.nature.com/articles/d41586-025-00879-6" rel="noopener noreferrer" target="_blank">The best foods for healthy ageing ― and the worst</a><h2>10:21 Shingles vaccine linked to reduced dementia risk</h2>A large-scale population study suggests that getting a shingles vaccine reduces the probability of someone getting dementia by around one-fifth. By taking advantage of the way a shingles vaccine was rolled out in Wales, a team were able to compare dementia outcomes in vaccine-eligible people to those born just a few weeks earlier who were ineligible. Although more tests will be needed to confirm this finding and to understand the mechanisms behind it, the team hope that vaccination against this viral infection could represent a cost-effective way to for preventing or delaying dementia.Research article:&nbsp;<a href="https://www.nature.com/articles/s41586-025-08800-x" rel="noopener noreferrer" target="_blank">Eyting et al.</a><h2>20:20 Briefing Chat</h2>Data suggests that racial profiling plays a role in whether someone receives a traffic citation or fine, and studies suggest that paying researchers who review manuscripts could speed up the peer-review process, without affecting the quality of reviews.Ars Technica:&nbsp;<a href="https://arstechnica.com/science/2025/03/study-of-lyft-rideshare-data-confirms-minorities-get-more-tickets/" rel="noopener noreferrer" target="_blank">Study of Lyft rideshare data confirms minorities get more tickets</a>Nature:&nbsp;<a href="https://www.nature.com/articles/d41586-025-00968-6" rel="noopener noreferrer" target="_blank">Publishers trial paying peer reviewers — what did they find?</a><a href="https://www.nature.com/briefing/signup" rel="noopener noreferrer" target="_blank">Subscribe to Nature Briefing, an unmissable daily round-up of science news, opinion and analysis free in your inbox every weekday.</a><hr> Hosted on Acast. See <a style='color:grey;' target='_blank' rel='noopener noreferrer' href='https://acast.com/privacy'>acast.com/privacy</a> for more information.

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