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I'm Nicola Coughlan, and for BBC Radio 4, this is History's youngest heroes.
Rebellion, risk and the radical power of youth.
She thought, right, I'll just do it.
She thought about others rather than herself.
Twelve stories of extraordinary young people from across history.
There's a real sense of urgency in them.
That resistance has to be mounted.
It has to be mounted now.
Follow history's youngest heroes wherever you get your podcasts.
Hello and welcome to NewsHour on the BBC World Service.
I'm Celia Hatton, coming to you live from London.
Happy Lunar New Year's Eve to all who celebrate.
And it really is a happy new year for one Chinese company, the startup behind the artificial intelligence chatbot Deepseek.
We're used to hearing about the eccentric side projects of billionaire entrepreneurs.
Tesla's Elon Musk and Amazon's Jeff Bezos have both made significant investments in space technology, for instance.
But it's the Deep Seek chatbot, a quiet side project from a Chinese tech billionaire, that's upending financial markets and posing a lot of uncomfortable questions in Washington and also Beijing today.
It's the brainchild of young entrepreneur Liang Wen Fong, described by partners as a very nerdy guy with a terrible hairstyle.
He made his money by training AI to make financial investments.
But on the side, he was creating Deep Seek, a remarkably powerful AI chatbot that's overtaken much pricier US competitors.