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

Trotzdem haben sie eine Sonderstellung. Auch wenn sich eine Kuh in Kärnten mit einem Besen kratzt.

Zwei Forscher räumen in der Evolution der Pferde auf: Der vermeintliche Urahn Hyracotherium war demnach nicht näher mit Pferden verwandt als mit Nashörnern.

Fossilien aus Marokko legen nahe, dass Neandertaler und Denisovaner sowie Homo sapiens früher als gedacht eigene evolutionäre Wege gingen. Wann und wo trennten sich die Linien?

Anas Sarwar says prime minister’s missteps have left party clear underdogs in run-up to May election

• UK politics live – latest updates

Keir Starmer and senior ministers have been urged by Scottish Labour to “stay behind their doors” in Whitehall to avoid turning the next Holyrood election into a referendum on UK government failures.

Anas Sarwar, the leader of Scottish Labour, said the prime minister’s policy failures and missteps had left voters “angry, frustrated and impatient”, leaving his party clear underdogs before May’s election.

Scientists argue ape-like Sahelanthropus tchadensis that lived in Africa 7m years ago is best contender but more fossils are needed

In the murky first chapters of the human story is an unknown ancestor that made the profound transition from walking on all fours to standing up tall, an act that came to define us.

The odds of stumbling on the fossilised evidence of such an evolutionary prize are slim, but in new research, scientists argue that an ape-like animal that lived in Africa 7m years ago is the best contender yet.

Over the holiday period, the Guardian leader column is looking ahead at the themes of 2026. Today we look at the impact of devolution on growing volatility of party political allegiance

Next year will be pivotal in British politics, and 7 May will be the point around which things pivot. Elections to local councils, the Scottish parliament and the Welsh Senedd will give millions of voters across the UK a chance to express party preferences. Their verdicts could imperil Labour and Conservative leaders. In Wales, Labour might be sent into opposition for the first time since devolution. Plaid Cymru and Reform UK are set to make substantial gains. At Holyrood, the Scottish National party (SNP) is on course for a majority. That would be an extraordinary defiance of political gravity for a party weighed down by nearly two decades of incumbency.

In England, both Labour and the Tories risk losing scores of councillors as their vote shares are gobbled up by the Liberal Democrats, Reform UK and the Greens. Those results will be taken as evidence that Sir Keir Starmer and Kemi Badenoch are failing as leaders. But it would be a mistake to filter the results only through that lens. The fragmentation of national allegiances began much longer ago.

Do you have an opinion on the issues raised in this article? If you would like to submit a response of up to 300 words by email to be considered for publication in our letters section, please click here.

Our 20 favourite pieces of in-depth reporting, essays and profiles from the year

Victor Pelevin made his name in 90s Russia with scathing satires of authoritarianism. But while his literary peers have faced censorship and fled the country, he still sells millions. Has he become a Kremlin apologist?