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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 Â鶹´«Ã½ journalists and world-leading researchers and thinkers.

Mind

How your heart rate variability can offer an insight into your mind

Smartwatches commonly use heart rate variability to monitor stress. Columnist Helen Thomson explores what this metric actually tells us, and whether it could also predict and diagnose depression – and help improve your mental health more generally

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Health

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

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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

For those who want a little help composting, take a cue from James Woodford’s experience raising worms – both the small colony of wrigglers he keeps in a sensible bin in his city garden and the dumpster-sized worm farm he has that can turn even animal carcasses into nutrient-dense soil

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Health

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

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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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