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Stay informed with commentary and opinion pieces on the latest issues in science, technology, health and the environment, written by expert 91av journalists and world-leading researchers and thinkers.

Life

Stop treating your pet like a fur baby – you’re damaging its health

Pet owners' increasing tendency to see their animals as children rather than dogs or cats can have dire consequences. Owners, and veterinarians, should be wary, warns Eddie Clutton

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Lot of vaccine glass vials arranged in a rows on blue background, 3d rendering illustration.; Shutterstock ID 1906552987; purchase_order: -; job: -; client: -; other:

Health

Human challenge trials have never been more popular

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Physics

Why quantum mechanics says the past isn’t real

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Mind

Can viral relationship tests really tell you about your relationship?

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Mind

Cold-water swimming has benefits for the brain as well as the body

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Plasma ball, conceptual illustration.

Space

Why dark matter is still one of the biggest open problems in science

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Oxfam activists wearing oversized masks representing (L to R) Brazil's President Luiz Inacio Lula da Silva, France's President Emmanuel Macron, European Commission President Ursula Von der Leyen, Argentina's President Javier Milei, US President Donald Trump, Britain's Prime Minister Keir Starmer, South Africa's President Cyril Ramaphosa, Canada's Prime Minister Mark Carney and Mexico's President Claudia Sheinbaum pose during their "Big Heads" protest at Utinga Park in Belem, Para state, Brazil, on November 20, 2025, to simulate a chaotic emergency room and highlight that as the COP30 UN Climate Change Conference ends, the planet is in critical condition. With UN climate talks nearing a close in Belem, the world body's chief on Thursday urged nations to reach an "ambitious compromise" that keeps alive the goal of limiting long-term planetary warming to the critical 1.5C threshold. (Photo by Pablo PORCIUNCULA / AFP) (Photo by PABLO PORCIUNCULA/AFP via Getty Images)

COP30: The UN climate summits are no longer fit for purpose

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Mind

Why memory manipulation could be one of humanity’s healthiest ideas

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A futuristic depiction of a woman wearing neon light-up augmented reality glasses. The glasses emit blue and red lights, creating a cyberpunk atmosphere. The young Black woman is captured in a dark environment with dynamic light streaks, emphasizing the high-tech and futuristic theme.

Technology

Imagining a future where smart glasses allow ‘AI slop’ to be avoided

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Health

Cars are getting bigger. This is a problem for us and for the planet

Sport utility vehicles and other larger cars are becoming more and more common, and this is dangerous for our health in many ways. But we have ways to counter "carspreading", says Anthony Laverty

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Health

How a new way of thinking about fat could transform your health

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Physics

The forgotten women of quantum physics

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Humans

Analysing Hitler’s DNA for a TV gimmick tells us nothing useful

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Life

Sperm are selfish – and so are we

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