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I'm Natalia Melman Petruzella and from the BBC.
This is Extreme Peak Danger, the most.
Beautiful mountain in the world.
If you die on the mountain, you stay on the mountain.
This is the story of what happened when 11 climbers died on one of the world's deadliest mountains, K2, and of the risks we'll take to feel truly alive.
If I tell all the details, you won't believe it anymore.
Extreme Peak Danger.
Listen wherever you get your podcasts.
Hi, I'm Johnny diamond and from the BBC World Service.
This is the global story.
It's been called a Sputnik moment, a reference to that time when the Soviet Union astounded the world by beating the US in the race into space.
If you believe the hype, China hasn't just beaten the US in the race to build better artificial intelligence.
It's done it at a fraction of the cost of its American competitors, working around the export curbs put in place by the US to restrain China's tech ambitions, and in so doing, reinventing the way AI is designed.
Oh, and wiping hundreds and billions of dollars off the value of America's tech titans in the process.
The damage has been inflicted by a Chinese company called Deepseek, based in the eastern city of Hangzhou.
It's created an AI assistant that on Monday became the most downloaded app in the US Investors are licking their wounds.
Consumers are lapping it up.
And everywhere conventional wisdom is being challenged.
So has one small Chinese company rewritten the rules of the trillion dollar industry of the future?