You may think you know when someone’s trying to deceive you, but there’s a clever trick very few people are aware of – one that has eluded AI and Traitors contestants alike

Can you tell if someone is lying?

Close your eyes. You’re already twice as good as you were before.

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• Report: Andy Burnham has path to challenge PM but must win byelection first

Al Carns, the defence minister first elected in 2024, will launch his own leadership bid if a contest starts, Sky News is reporting.

Asked about this last night, Carns told Sky: “I’m just a humble junior minister.”

Unless Labour understands that insecurity on an emotional level as well as on an economic one, we will continue to lose voters who would naturally align with us. Working-class voters have not simply left Labour. Many feel Labour stopped understanding their lives, and so they looked elsewhere.

What is the point of Labour if it does not represent Sheffield, Stoke-on-Trent, Barnsley, Swansea and Aberdeen? What is the point of the Labour party if it cannot replace despair and frustration with hope, stability and purpose? The party was founded to give ordinary working people security, dignity and bargaining power over their lives.

Molar found in Siberia features deep hole that appears to show earliest known evidence of dental treatment

Neanderthals used stone drills to treat cavities almost 60,000 years ago in what is the earliest known evidence of dental treatment.

The single molar, which was unearthed in a cave in southern Siberia, features a deep hole that appears to have been created using a sharp, thin stone tool during the lifetime of the tooth’s owner.

Progressive nationalist parties now hold power in Edinburgh, Cardiff and Belfast. That will be a challenge for the United Kingdom’s overcentralised state

When the Scottish and Welsh parliaments were created on the eve of the millennium, the then Labour government in Westminster believed that it had engineered a win-win situation. Devolution, it was hoped, would see off any nationalist threat in Scotland and Wales. Meanwhile, the Labour party’s longstanding political dominance in both nations would see it take comfortable control of the two new parliaments.

That was then. Last week’s devolved elections left Scottish and Welsh Labour battered, bruised and humiliated. Plaid Cymru’s historic victory in Wales, and a fifth successive triumph for the Scottish National party (SNP), mean that pro-independence governments are now set for the first time to rule in Edinburgh, Cardiff and Belfast (where Sinn Féin won in 2022). The starting gun has been fired on a new and constitutionally contested era in the politics of the UK.

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Research offers insights into domestication of dogs but it remains unclear why they ended up with smaller brains than wolves

It has long been known that dogs have less between their ears than wolves, but now research has suggested their brains started to get smaller at least 5,000 years ago.

Experts say the results offer fresh insights into the domestication of our canine companions. However, the findings are unlikely to explain why your spaniel will only drink from a muddy puddle: the researchers say a reduction in brain size does not mean dogs are dafter than their wolf-like ancestors.

Early birds were like ‘T rex reincarnated’, says scientist who believes avian skulls offer insight into dinosaurs’ behaviour

T rex is often depicted as more brawn than brains, but now scientists are hoping to probe just what was going on inside its head, drawing on findings from another kind of dinosaur: birds.

Scientists have previously found some species of bird not only make and use tools, but are able to plan ahead and show basic forms of empathy – with laboratory tests suggesting emus can recognise other birds might have different experiences to themselves.

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

This week’s question: Donald Trump is not the messiah. But what does it take to convince people that you are?

What would the world look like if nobody ever made a mistake? Ian Osborne, Worcestershire

Send new questions to nq@theguardian.com.

Scientists who analysed nearly 16,000 ancient remains suggest red hair and fair skin is favoured for vitamin D production

People with red hair who have put up with teasing or “fiery” stereotypes may be pleased to learn that they appear to be winners from an evolutionary perspective. A large genetics study has revealed that, in Europe, the gene for red hair has been actively selected for more than 10,000 years.

The study did not aim to uncover the reasons for the trend, but focused on the broader question of whether human evolution has plateaued since the advent of agriculture. By analysing DNA from nearly 16,000 ancient human remains and more than 6,000 living individuals, the scientists provided compelling evidence that, in fact, biological evolution has continued apace.

Prime minister has been in talks with Saudi crown prince and UAE president today

In interviews this morning Yvette Cooper, the foreign secretary, declined to confirm reports that a Russian warship has been escorting two sanctioned Russian ships through the English channel.

Sanctioned Russian ships carry oil being sold to fund the war in Ukraine, and the UK government recently announced that the armed forces have been authorised to board these ships in British waters to stop them.

What I can tell you is that we have given permission now for action to be taken against the Russian shadow fleet. Operational decisions then have to be taken in the right way by the military.

There are indications of the way in which not just the Russian shadow fleet is operating, but also the way in which we are seeing increased Russian threats, not just to the UK, but across Europe as well.

With polls suggesting Plaid Cymru, the SNP and Sinn Féin could be in power after May vote, constitutional challenges may lie ahead

In four weeks, the shape of British politics is likely to change dramatically. For the first time, nationalists who aspire to break up the UK are expected to be in control of Scotland, Wales and Northern Ireland simultaneously. “The change will be seismic,” said Angus Robertson, a senior minister in the Scottish government.

Opinion polls consistently suggest that after the elections on 7 May, England will be flanked by countries run by restless centre-left nationalist parties – Plaid Cymru in Cardiff, the Scottish National party in Edinburgh and, in Belfast, Sinn Féin, which shares power with the Democratic Unionists.

Seit Jahrzehnten debattieren Forscher darüber, ob die Evolutionspsychologie eine echte Wissenschaft ist oder nur modernes Geschichtenerzählen. Kann sie wirklich etwas erklären?

The latest research suggests there’s far more to good fortune than mere accident

When the founder of Panasonic, Kōnosuke Matsushita, was asked what quality he valued most in job candidates, his answer baffled everyone: whether they were lucky. Not their credentials, not their intelligence, not their experience. Luck. For years, this anecdote struck me as charmingly eccentric – the kind of thing a titan of industry gets away with saying because nobody around them dares to laugh. Then I began studying the neuroscience of fortunate people, and I stopped laughing, too.

What my research has revealed is that luck, far from being a roll of the cosmic dice, operates through identifiable patterns of brain chemistry and behaviour. The consistently lucky are not blessed by fate. They are running different neurological software – and the remarkable thing is that this software can be installed.

The whole ecosystem inside a cave feeds off guano, dead bats, or any dead animals on the ground. It’s not for the faint-hearted

It can be daunting entering a cave. It is an underground world that possibly hasn’t been explored before. The first smell that hits you is guano (or bat poo). Some of these caves host millions of bats – you can hear them chirping above, hanging in the darkness, and occasionally flying around. It always seems like night-time inside a cave because it’s pitch black.

The walls are covered in interesting creatures such as tailless whip scorpions, which look like a cross between a spider and crab (they look dangerous, but are not), as well as millipedes and centipedes. The whole ecosystem feeds off guano, dead bats, or any dead animals on the ground. It’s not for the faint-hearted.

Humans are hard-wired to care for and protect each other. Becoming kinder is just like riding a bike

As a species, Homo sapiens have a bad reputation. War, environmental pillage, weapons of mass destruction – if the human race were applying for the job as planetary custodian, we wouldn’t even make it through to the interview stage.

But maybe we are not as bad as we think. According to the author and psychologist Steven Pinker, human society has become kinder over the course of recorded history, perhaps not in a linear fashion, but in absolute terms. He argues in The Better Angels of Our Nature that, over the long arc of history, violence – including murder, cruelty and war deaths – have declined.

Jackie Bailey is an award-winning author whose nonfiction book about spirituality, The Outrageous Good Fortune of Living (HarperCollins), will be released this year. Jackie works as a funeral celebrant and pastoral care practitioner, supporting people to navigate death and dying

Leak of memo comes after a third of Labour Senedd members raise alarm devolution is being rolled back

• UK politics live – latest updates

Keir Starmer warned his cabinet against an “overly deferential” approach to the Welsh, Scottish and Northern Irish governments, according to a leaked memo.

In the document from December, obtained and published on Tuesday by Plaid Cymru, Starmer said ministers should be prepared to make spending decisions “even when devolved governments may oppose this”. It came shortly after Labour Senedd members wrote to the prime minister over concerns his administration was rolling back devolution powers.

Fossilien eines Primaten aus Bulgarien deuten darauf hin, dass dieser bereits aufrecht auf zwei Beinen ging. Nahm die menschliche Linie doch nicht in Afrika ihren Anfang?

Yes, there are plenty of big-budget visual effects of prehistoric creatures in Steven Spielberg’s natural history show. But the voiceover is the real draw

It’s difficult these days to make a nature documentary that isn’t like all the others. Spectacular landscapes, crisp closeup photography, tales of predation and survival, birth and death: whether you go for Pixar cuteness, crimson claws or environmental crisis, it’s been done 100 times before. Watching The Dinosaurs, it’s hard not to sense the same problem starting to affect factual shows about the animal kingdom as it was millions of years ago. Impressive as it is that big-money dino documentaries boast visual effects that look similar to footage of Earth today, we are getting used to it.

Before the opening titles roll, cliches from two genres have been cross-bred. From regular animal shows, there’s the one where a lone male tries to muscle in on a family unit, forcing the existing patriarch to fight for his status against a younger, stronger rival. Our friend who looks as if he’s about to be fatally pushed aside is a pachycephalosaurus, but the dynamic is the same. Then the two males’ head-smashing battle is interrupted by a familiar sight from dinosaur documentaries: the animal posing a threat is suddenly bitten in two by a Tyrannosaurus rex, leaping unbidden through the undergrowth with a camp flourish. The pachycephalosaurus clan, led by their relieved dad, scurry happily away to the sound of the interloper’s cracking skull.

Scientists say DNA evidence indicates male Neanderthals and human females interbred more often than opposite

Tens of thousands of years ago, as modern humans migrated into northerly territories inhabited by our ancient cousins, the Neanderthals, the two species met – and sometimes mated.

Now, genetic evidence has revealed a striking imbalance in these prehistoric trysts, suggesting that interbreeding was mostly between male Neanderthals and female humans.

Masoud Pezeshkian tries to convey message of national unity as negotiations with US hang in balance

• US politics live – latest updates

Iran’s president insisted his country was not seeking a nuclear weapon as he acknowledged “great sorrow” after the authorities’ recent crackdown on protesters.

Speaking to crowds gathered across Iran to mark the anniversary of the 1979 revolution, Masoud Pezeshkian sought to claim a message of national unity after demonstrations that roiled the country and triggered an unprecedented crisis for the regime.

As fewer people choose to pair up, let alone marry, it could be that our species’ mating patterns are moving closer to the natural order

Monogamy, you may have heard, is in crisis. Fewer people are in relationships, let alone opting to be in one ’til death. And even those who have already exchanged vows seem to be increasingly looking for wiggle room. “Quiet divorce” – mentally checking out of your union, rather than going through the rigmarole of formally dissolving it – is reportedly on the rise, as is “ethical non-monogamy” (ENM) and opening up a relationship to include other partners.

This is borne out by my experience on mainstream dating apps. About one profile in every 10 I come across seems to express a preference for “ENM” or polyamory, or mentions an existing wife or girlfriend. The best you can hope for, if you’re prepared to accept those terms, is that the “primary partner” really is across the arrangement as described.

Elle Hunt is a freelance journalist