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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.

Mandatory Credit: Photo by Blondet Eliot/ABACA/Shutterstock (15320742p) This photo taken on May 26, 2025, during a ministerial visit to Novo Nordisk factory in Chartres, France, shows medicines (injection solution and injection pen for Ozempic, Wegovy, etc...) on the production line. Illustration - Novo Nordisk Factory - Chartres, France - 26 May 2025

Health

We should consider testing Ozempic on healthy people

As the list of health benefits of semaglutide drugs grows, perhaps it is time to think about assessing their impact on people without medical conditions

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Space

New NASA head wants to build a nuclear reactor on the moon – but why?

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Mind

What are the best ways to improve your cognitive reserve?

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Mathematics

These centuries-old equations predict flowing fluid – until they don’t

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Mind

Why living in a volatile age may make our brains truly innovative

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RC9MHB Rome, Italy, 05/06/2018: a street artist simulates an invisible man on the pedestrian area along tevere castello near castel sant'angelo.

Technology

How invisibility cloaks could make us disappear – at least from AI

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Team of EMS Paramedics React Quick to Provide Medical Help to Injured Patient and Get Him in Ambulance on a Stretcher. Emergency Care Assistants Arrived on the Scene of a Traffic Accident on a Street.

Health

Let a breakthrough in measuring body clocks ease the ills of shiftwork

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Technology

Social media is dead – here’s what comes next

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The Southern Delta Aquariid meteor shower in the night sky. The Aquariids are visible from mid-July to mid-August each year, with peak activity on July 28 or 29. Photographed with a Canon Rebel Xsi, 17mm lens, ISO 800, 20 sec. exposure.

Space

How to spot the Delta Aquariids meteor shower this month

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Creepy blank gravestone in graveyard at night with low spooky fog; Shutterstock ID 1890736525; purchase_order: -; job: -; client: -; other: -

Humans

Homo naledi’s burial practices could change what it means to be human

If ancient humans with brains a third the size of our own buried their dead, as some archaeologists are claiming, then our species may be less special than we thought

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Mind

Tapping into the full power of music could transform our lives

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Earth

We’ve found that a new type of rock is forming from old slag heaps

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Environment

Have we found an unlikely solution to the climate impact of flying?

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Environment

Why we urgently need to talk about geoengineering

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