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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.

Health

Is stem cell therapy about to transform medicine and reverse ageing?

A clinical trial to reverse age-related vision conditions using stem cell treatment could finally deliver on the promise of a major discovery in ageing and regeneration made 20 years ago, says columnist Graham Lawton

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Mind

Why is it so hard to change your mind?

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Space

The rise, the fall and the rebound of cyclic cosmology

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Humans

Are Neanderthals descendants of modern humans?

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Physics

The stunning physics of Project Hail Mary go back to ancient China

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Mathematics

The man who ruined mathematics

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Physics

How a century-long argument over light’s true nature came to an end

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Health

Iodised salt has become uncool but many of us need to eat more iodine

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Environment

How a DIY worm farm can compost food scraps, paper or a whole kangaroo

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Health

I have been bitten by more than 200 snakes – on purpose

If you are unlucky enough to have been bitten by a snake, you are unlikely to want to repeat the experience. Not so for Tim Friede, who intentionally exposes himself to deadly bites in the hope of developing a treatment for the 5 million people who are bitten each year

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Mind

The best kind of olive oil for brain health

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Space

I almost drowned in space when my helmet filled with water

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Physics

How Anthony Leggett pushed the boundaries of quantum physics

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Health

Are humans degenerating genetically and getting dumber as a result?

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