An accomplished cellist, TED Fellow Joshua Roman has practiced his instrument daily since he was a child — until a severe case of long COVID almost robbed him of his ability to play. In an inspiring talk, he plays a piece by Johann Sebastian Bach, shares how he found his way back to music and then performs a staggering new solo composition, titled “Immunity.”

Picture this: you’re wearing a normal-looking pair of glasses, but they give you the ability to quickly summarize a book, translate between languages or remember where you left your keys. In a live demo of unreleased technology, computer scientist Shahram Izadi unveils Google’s new Android XR platform, which aims to give users the power of AI via smart glasses and headsets. He’s joined onstage by two colleagues, giving a glimpse of the future of “extended reality” (XR) devices — smart, seamless and right before your eyes.

What if the race to save the planet is harming the people who protect it? Indigenous advocate Galina Angarova exposes the hidden cost of the green energy transition, where the demand for minerals like nickel and lithium threatens to devastate Indigenous lands and livelihoods. She calls for a radical shift in mindset — one that centers Indigenous leadership, consent and reciprocity as the foundation of a truly just and sustainable future.

Why do we assume single people aren’t happy? Behavioral economist (and lifelong bachelor) Peter McGraw advocates for a world in which single life is just as accepted as marriage, debunking the myth that getting hitched is the only path to fulfillment. From spinsters to cat ladies, he outlines the power in chosen family — and invites you to reconsider what it means to live a remarkable life.

The AI revolution is here to stay, says Sam Altman, the CEO of OpenAI. In a probing, live conversation with head of TED Chris Anderson, Altman discusses the astonishing growth of AI and shows how models like ChatGPT could soon become extensions of ourselves. He also addresses questions of safety, power and moral authority, reflecting on the world he envisions — where AI will almost certainly outpace human intelligence. (Recorded on April 11, 2025)