Stars have cores hot and dense enough to force atomic nuclei together, forming larger, heavier nuclei in a process known as fusion. In this process, the mass of the end products is slightly less than the mass of the initial atoms. But that “lost” mass doesn’t disappear — it’s converted to energy ... a lot of energy. So, can we harness this energy to power the world? George Zaidan investigates. This TED-Ed lesson was directed by Igor Ćorić, Artrake Studio, narrated by George Zaidan and the music is by Cem Misirlioglu and Brooks Ball.

Many people associate innovation with secrecy—privately toiling away on a project until you're ready to share it with the world. While that may work for some, there's a benefit to putting all your cards on the table. Bilawal sits down for a conversation with Thomas Wolf, whose company Hugging Face pivoted from privately building an AI chatbot to sharing all of its knowledge with a growing online community. Thomas discusses the history of Hugging Face, why embracing open source development has shifted the trajectory of AI, and how open source can challenge existing power structures in the AI world. For transcripts for The TED AI Show, visit go.ted.com/TTAIS-transcripts

“Memories are the architects of our identity,” says technologist Pau Aleikum Garcia, but they’re not permanent. Photos can be lost amid political unrest or natural disaster, while illnesses like Alzhemier’s can rob people of their past. He puts forward a novel solution — “synthetic memories,” or dreamlike visualizations of long-gone moments created through generative AI — and explores how it could reconnect families or even enhance cognitive abilities.