Questions and doubts about vaccines are on the rise worldwide and public-health specialists worry that these trends could worsen. But while the shift in public attitudes towards immunizations can leave scientists, physicians and many others feeling disheartened, a surge of research on vaccine hesitancy is starting to offer ways to address the issue.

This is an audio version of our Feature How to speak to a vaccine sceptic: research reveals what works

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Many harmless animals mimic dangerous ones to avoid being eaten, but often this fakery is inaccurate. To help explain why evolution sometimes favours imperfect mimicry, a team 3D printed a range of imaginary insects. The novel creatures were designed to mimic wasps with varying degrees of accuracy and the team then presented these models to different predators. They showed that while birds were hard to fool, invertebrate predators were less able to discern between the mimics and accurate wasp models. The results suggest that predator perception plays a key role in the level of accuracy needed to fool them and may help explain the existence of inaccurate mimics in nature.

Research article: Taylor et al.

News and Views: 3D printing offers a way to study mimicry by insects

Ritual ‘retirement’ rather than family feud may explain broken statues of a female pharaoh, and how kelp ‘loofahs’ made by killer whales might be the first example of toolmaking by a marine mammal.

Research Highlight: The shattered statues of Queen Hatshepsut: the reasons for the wreckage

Research Highlight: Killer whales exfoliate each other with home-made scrubbers

The sea slugs that steal chloroplasts to snack on, and the researchers re-enacting a Stone Age sea-voyage.

Nature: ‘Wildest thing’: solar-powered slug steals chloroplasts and stores them for emergencies

Nature: These scientists re-enacted Stone Age voyage to Japan’s remote islands

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A significant amount of research in the AI field of computer vision is being used to analyse humans in ways that support the development of surveillance technologies, according to new research. By analysing the contents of thousands of research papers, the team behind the work showed that 90% of studies, and 86% of patents resulting from them, involved data relating to imaging humans. While there are many positive applications for this technology, such as in medical diagnostics, this work shows evidence of a pipeline from computer-vision research to surveillance.

Research article: Kalluri et al.

News and Views: Computer-vision research is hiding its role in creating ‘Big Brother’ technologies

Video: Is AI powering Big Brother? Surveillance research is on the rise

News: Wake up call for AI: computer-vision research increasingly used for surveillance

Editorial: Don’t sleepwalk from computer-vision research into surveillance

A minuscule robot that can manipulate liquid droplets, and the sensors that can identify hydrothermal explosions at Yellowstone National Park.

Research Highlight: This tiny robot moves mini-droplets with ease

Research Highlight: Sensors pinpoint the exact time of a Yellowstone explosion

This week, the Vera C. Rubin Observatory in Chile has unveiled the first images from its 3,200 megapixel digital camera. We discuss the images, and how the facility will help researchers learn more about the Universe.

News: First images from world’s largest digital camera leave astronomers in awe

How scientists created hexanitrogen, a new molecule made of six nitrogen atoms, and the why researchers are excited about the first confirmed skull of an extinct Denisovan.

Chemistry World: Most energetic molecule ever made is stable – in liquid nitrogen

Nature: First ever skull from ‘Denisovan’ reveals what ancient people looked like

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