The subversive bacchanal for San Francisco’s eccentric underground is ageing out amid an influx of the super-rich

Burning Man, the infamous arts festival in the Nevada desert, turned 40 this year, and it’s showing some distinct signs of middle age.

It’s not just the tech billionaires who show up to party, the chartered flights straight to the desert or the HBO documentary about behind-the-scenes power struggles. The tens of thousands of people who assemble each year to create a tent city in the wilderness appear to be growing older, and it doesn’t seem that they’re being replaced by as many younger “burners”, as festival participants are called.

Three little letters - bnb-side’s name is a play on the local b-side arts festival, but Silicon Valley colossus sees threat to global brand

In one corner is bnb-side, a six-room bed and breakfast on the Isle of Portland – a tiny wedge of limestone tied by a narrow ribbon of shingle to the Dorset coast – that was created to help secure the future of the rock’s much-loved arts festival, b-side.

On the other is Airbnb, the San Francisco-based booking colossus. The battle between them is over the three little letters they share.

Alex Gibney’s marathon documentary delivers numerous eye-raising insights into the broligarch’s business deals, early idealism and apocalyptic appetite for fathering children

Veteran documentarian Alex Gibney’s film about the richest broligarch on the planet has been one of the most eagerly anticipated films at the Venice film festival this year. The Oscar-winning 72-year-old, who has in previous films taken on the US military, the Catholic church, Vladimir Putin and Scientology, has been investigating the tech tycoon’s ascent and speaking to people in his orbit since late 2022, before his Maga turn and Trump 2.0.

The result clocks in at just under four hours and presents a comprehensive answer to how on earth one man managed to amass so much money and political influence. It is shocking less for any individual new pieces of information Gibney has unearthed than for its totality. Here are six things the film tells us:

A zero-emission compact hydrogen power plant will drive the two stages at Clifton Down in Bristol

When Lorde, Little Simz and Wet Leg stride on to stages in Bristol this weekend, they will not only be entertaining tens of thousands of festivalgoers but taking part in what is being billed as a world-first clean power project.

The two stages at Forwards festival on Clifton Down are being driven almost entirely by green power – a combination of hydrogen and mobile batteries charged with sustainable energy.