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

Despite AI's dizzying improvements in mathematical ability, its successes show just how integral human mathematicians are to the scientific process

Why do we have big brains? Or walk on two legs? Biological anthropologist and broadcaster Alice Roberts talks human exceptionalism, evolution and her new book Humans with Michael Marshall

Giulia Enders made her name with Gut, an exploration of our intestines. Now, in the compelling follow-up Organ Speak, she’s listening to what our other organs are telling us

A circle running along the 27° east and 153° west meridians divides the globe into two halves with equal reflectivity – and this may have implications for solar geoengineering schemes

A UN report warns of the rapid growth in AI energy consumption, but suggests users can improve efficiency by making prompts more concise

A quantum computer made from extremely cold atoms can correct its own errors during long computations, an important prerequisite for becoming truly useful

Restricting carbohydrates may sound like an unlikely approach to treating anorexia, but following a ketogenic diet was linked to recovery in nearly 75 per cent of people with the eating disorder in a small trial

Researchers studying a 5300-year-old mummified man have identified bacteria that lived in his gut when he was alive, as well as cold-tolerant fungi that colonised his body after death

Ages 40 to 65 see a period of turmoil in the brain that has previously been overlooked. But identifying problems during this time can protect your cognitive health for decades to come

Our understanding of the electromagnetic spectrum goes back to Isaac Newton, but astronomers are still finding new ways to employ it. Astrophysicist Emma Chapman explores how much these invisible waves can reveal to us about the cosmos – and whether they might show us that we’re not alone