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Lapses in memory are a normal part of ageing but can also be signs of dementia. Here’s how to distinguish between typical brain ageing and cognitive decline

A diverse range of bird species has been recorded at a solar park on rewetted peatland in Germany, suggesting that combining energy generation with habitat restoration could benefit biodiversity, the climate and the economy

UK Prime Minister Keir Starmer has warned tech firms, including Apple and Google, that they must voluntarily implement tools to stop children sharing explicit images, but experts warn this is easier said than done

Each decade the world is losing over 7 per cent of its freshwater storage capacity to sediment build-up, according to an analysis of over half a million reservoirs

One-third of people with anorexia nervosa don’t recover and treatment has remained stagnant for years. Now we’re beginning to understand how the condition takes over the mind

Endometriosis is usually thought of as a gynaecological condition, but a huge study shows it has links with cholesterol levels, inflammation and an altered microbiome

Mice seemed to reap some of the benefits of sleep by having their brain activity stimulated while they were awake, and the researchers plan to test the approach on people

A team in the US has reported promising results after using an improved form of CRISPR to gene-edit human embryos, but a major issue remains unsolved

Scientists warn that the Trump administration's push to dismantle a vital network of ocean-sensing instruments will stymie crucial weather and climate monitoring in the Pacific and Atlantic

The modern world depends on open-source software maintained by volunteers, but the added demands of checking and fixing AI-written submissions are causing some to burn out and quit

Mice that contain cells with an added rat chromosome have been created by scientists. The next step is to try this with frozen elephant tissue – and if that works, the team will try it with frozen mammoths

A seemingly simple set of rules kicks off a kind of mathematical magic trick, which has kept great minds busy since the 1930s. Columnist Jacob Aron explores the origins of the Collatz conjecture, why it is so addictive to mathematicians and whether AI could help us solve it once and for all

Parents report loving their partners less within the first year of having a child, but that doesn't mean the feeling is permanent or inevitable

A patch of ocean south-east of Greenland is the only place on Earth that is cooling, and it could be a sign that the warm water "conveyor belt" in the Atlantic is slowing down

Rachel Carson’s look at the dire effects of industrial and agricultural pollution birthed the modern environmental movement when it was first published – and remains as crucial a read today, finds Rowan Hooper

A glacier could have carried the giant sandstone at the centre of Stonehenge southwards from north-east Scotland, but this scenario appears unlikely

Actor Ben McKenzie explores the world of crypto in an entertaining documentary that doesn't shy away from calling out those who have promoted the currency

Global warming will amplify the impacts of El Niño events, and could also make them much stronger and more far-reaching

A new retrospective of the artist beloved by mathematicians opens this week. Get up close to the art with our interactive story

A new retrospective of M.C. Escher’s work opens this week. Explore some of his most mind-bending, mathematically inspired works here