What can happy rats teach us about human joy? Behavioral neuroscientist Kelly Lambert describes how her team trained rats to drive tiny cars to earn treats — and noticed something surprising about how effort and anticipation affect the brain. The experiment opens new questions about how reward, agency and “behaviorceuticals” might help build resilience and support mental health. (Recorded at TEDxRVA Youth on November 9, 2025

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Many gardeners work hard to maintain clean, tidy environments … which is the exact opposite of what wildlife wants, says ecological horticulturist Rebecca McMackin. She shows the beauty of letting your garden run wild, surveying the success she’s had increasing biodiversity even in the middle of New York City — and offers tips for cultivating a garden that can be home to birds, bees, butterflies and more.

OpenClaw creator Peter Steinberger takes us back to the transformative moment he let his AI agent loose on the internet, igniting one of the world’s fastest-growing open-source projects. He makes a fascinating (and slightly unnerving) case that agents are a real shift, not just better versions of chatbots, and explores how they might reshape your ability to work, build and create. “The lobster is loose, and it’s not going back into the tank,” he says. (Followed by a brief Q&A with TED Chairman Chris Anderson) (Recorded at TED2026 on April 16, 2026)

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