When was the last time you just … played? Creative health scientist Katina Bajaj thinks adults are in a “play deprivation crisis,” where we’ve replaced our fun-loving human nature with optimization and efficiency. She makes the case that play isn’t a reward for productivity but rather a survival skill — and invites you to rediscover the freedom of not knowing where something will end up.

There’s more health advice available than ever before — and no easy way to tell what’s worth your time. From biotech breakthroughs to smarter cancer screening, physician Dhruv Khullar and microbiologist Zack Abbott examine what happens when science can change who we are — including the potential of reengineering the human body — and what medicine might look like in 20 years. (Made possible with the support of ZBiotics)

TED Fellow Ryosuke Takashima is the youngest-ever mayor in Japan’s history — but he doesn’t consider himself a politician. His approach to leadership is simple: listen to as many voices as possible (from students to elders) in order to figure out what needs fixing. Hear why he thinks inviting citizens to participate in reforming their own communities is the best way to get things done. (Recorded at TED Fellows Films 2026 on April 14, 2026)

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