This evening service from London to Crewe is hot, sweaty and heaving with people, many having to stand or sit in the gangways

The 5.46pm train from London Euston to Crewe is the low point of Nikhil Patel’s week. “I’ve never gotten a seat. I always stand up even when I get here early,” says the 22-year-old, struggling to keep his balance while the gangway underneath sways from side to side.

Painfully for Patel, who is commuting back and forth to the capital for a computer science internship, it’s the first leg of a three-hour journey home to Walsall. He grabs the back of a chair to remain steady but says he’s just thankful that the train has left on time – and that it’s even on the move at all.

Humans are the only animals whose faces redden with embarrassment. Should we see that as an affliction, or as a blessing?

‘Blushing is the most peculiar and most human of all expressions,” Charles Darwin once wrote, and he wasn’t wrong. Though certain species of bird pinken up as a means of communication, and uakari monkeys have red faces when in good health, we seem to be the only animal that flushes as a sign of embarrassment.

“It’s a very truthful signal,” says Prof Sophie Scott, the director of the Institute for Cognitive Neuroscience at University College London. “It’s not fakeable, and there aren’t many things that humans do that fall into that category. You can’t blush on command.”

The UK and Europe have been facing extreme heatwaves – Greenpeace recorded temperatures of up to 53C at one London playground in recent weeks. It’s clear our cities are not equipped to deal with the soaring temperatures brought by the climate crisis. With the ‘Super El Niño’ on its way, next year is forecast to get even hotter. But is anyone really doing anything about it? The Guardian’s deputy opinion editor Kirsty Major goes in search of playgrounds that are adapting to our new reality

Whether you’re nursing a joint, have an existing condition or just don’t feel like running, these exercises help get your cardio in

The runner’s high might be contagious. In 2024, fitness tracking app Strava recorded a 59% increase in users attending social running events and run clubs globally. Applications for London’s marathon have increased 40% since 2024, while New York City’s received about 20% more applicants this year. Overall, an estimated 56 million Americans regularly run on a treadmill and 51 million jog, according to a report from the Sports and Fitness Industry Association.

But running has a reputation for being rough on our joints. There is some good news for those chasing the high: one 2023 study found little relationship between recreational running and arthritis of the hip or knee, and another suggests that the impact of running causes cartilage to adapt, fortify and thicken over time.

Britain exported 139,000 tonnes of rubbish to Turkey last year, leaving smallholders and poor districts of Adana to cope with the debris, microplastics and toxic smoke

• UK plastic ‘waste colonialism’ found to be polluting Turkey’s farming heartland

Plastic debris clings to the reeds in a waterway metres from where Ayhan*, a farmer in Adana, southern Turkey, is harvesting aubergines. “We get pollution from all sides here,” he says, referring to the plastic recycling zone upstream, as well as a nearby textile plant that he suspects is making the water acidic. “The plastics are all there, by the bank, and the fumes come this way.”

Between May 2021 and July 2024, 13 British companies sent 545 shipments of household and supermarket plastic waste, totalling 52,000 tonnes, to the Kemal Deniz recycling zone, under a mile from Ayhan’s aubergine fields, according to data analysed for the Guardian by the Environmental Investigation Agency (EIA), an international NGO.

Brian Logan offered advice for young comedians, discussed being spotted at a show, demystified star ratings, and considered whether the fringe is really ‘Edinburgh’

Achhca asks: Hi Brian! Reviews at the fringe seem to have extra weight to them, especially the exact star rating - four stars can go on the poster, three stars may as well be zero. What are your criteria for stars, and is it informed by the knowledge that a 4+ will end up stapled on posters across the city?

And brion asks: Why have you offered so few five star reviews? What is your rubric for a five star score?

Brian: I try to think about star ratings as little as possible. My job, as I see it, is to write something insightful, respectful and hopefully entertaining about a show; and to express all I have to say about that show in words. At a stretch, I recognise the usefulness, to some, of then appending a star rating to that review. But I wish we didn’t have to. It’s reductive and dumb. My own kids ask me after I’ve seen a show ‘what did you give it?’ rather than ‘what did you think of it?’ That makes me sad.

But: let’s not take ourselves too seriously! There was once, reputedly, a critic who never gave three-star reviews because he knew no one would read them. But most shows are three-star shows – i.e. good, enjoyable, competent if unexceptional. I’ll try to err on the side of enthusiasm whenever I can. God knows my own work has received enough two- (and lower) star reviews over the years. I know how depressing that is.

Matter to whom? They matter to me. My experience of art (books, movies, TV, whatever) is so massively enriched and improved by cross-referring it with the experience of reviewers. As soon as I close the last page of a book, I jump online and read what other people have said about it. I love to read what cleverer or better informed or just different minds to my own think about the shows and paintings and songs that I’ve experienced too. I find it weird that anyone might think otherwise.

Whether reviews matter in terms of an artwork’s success or failure (and who gets to define that?!) is less clear. Depends on the show. Depends on the circumstances. At any rate, reviewers are part of an ecology that responds to the art and entertainment that gets put out into the world, and one of the many factors that may influence how those artworks are received, understood and savoured. And the world would be more drab and undistinguished without them. (But then, I would say that…)

Country convenes emergency meeting of ministers from Arab and Islamic world, fearing such a move could ‘trigger a religious conflict’

• Middle East crisis live – latest updates

Jordan is convening an emergency meeting of foreign ministers from the Arab and Islamic world over what it says is an “imminent” threat of an Israeli takeover of the most important Muslim site in Jerusalem, with the potential to “trigger a religious conflict”.

The meeting on Wednesday – and the Jordanian warning – follow an escalating pattern of government-backed incursions by Jewish religious extremists on the compound around al-Aqsa mosque and Dome of the Rock, in violation of a status quo treaty overseen by Jordan’s Hashemite monarchy, by which only Muslims can pray at the site.

Probation inspector for England and Wales says ‘clunky’ system needs huge increase in staff

• UK politics live – latest updates

The electronic tagging system that will be relied upon to monitor thousands of offenders released early from prison is failing to alert the authorities of potential breaches of conditions, a watchdog has warned.

Martin Jones, HM inspector of probation in England and Wales, said the current system relied upon hard-pressed police and probation officers looking up individual cases and then deciding whether potential breaches need to be investigated further.

All passengers thought to have been taken to Boulogne after major air and sea rescue operation by France and UK

A dinghy carrying 157 people has capsized after its engine caught fire as it attempted to cross the Channel from France.

The people onboard were rescued from the water after a major air and sea operation was launched using UK border security and French vessels along with an RNLI boat.

• Senior Fifa duo pile pressure on under-fire president

• Wenger reveals he knew nothing about investment plan

Gianni Infantino’s authority was dealt a further blow after his No 2, the Fifa secretary general, Mattias Grafström, called the failed World Cup private investment plan a “sad and reproachable series of events”.

In further evidence that senior Fifa personnel continue to distance themselves from Infantino and his botched scheme, Arsène Wenger issued a statement on Tuesday morning saying the project’s withdrawal was “absolutely necessary and beyond question”. The former Arsenal manager is Fifa’s chief of global development and had publicly been silent about the crisis unfolding in world football.