TEDTalks (video)

Neurotechnology, or devices that let you track your own brain activity, could help you deeply understand your health. But without privacy protections, your innermost thoughts, emotions and desires could be at risk of exploitation, says neurotech and AI ethicist Nita Farahany. She details some of the field's promising potential uses -- like tracking and treating diseases from depression to epilepsy -- and shares reasonable concern over who collects our brain data and how they plan to use it, ultimately calling for the legal recognition of "cognitive liberty": the right to protect our mental privacy, freedom of thought and self-determination as we navigate the blurring line between the human body and brain wearables.

In the US, youth in foster care are nearly twice as likely as war veterans to suffer from PTSD. Placed in foster care at just 11 months old, 2023 Audacious Project grantee Sixto Cancel experienced the faults of the system firsthand. Now, he's the founder of Think of Us, an organization working to reform child welfare by centering kinship care, or placing a child with an extended family member or a familiar adult. Learn more about his plan to help thousands of kids searching for a loving home with one simple, systemic switch. (This ambitious idea is a part of the Audacious Project, TED's initiative to inspire and fund global change.)

Lots of people talk about the need to be physically fit, but mentally fit? Not as much. In a powerful talk, mental health advocate Gus Worland shares how an experience of deep grief from his own life sparked his mission to advocate for suicide prevention -- and shows why "looking after your own village" can be as simple as sending a text message, right now, to the person you cannot imagine living without.

AI-generated media that looks and sounds exactly like the real world will soon permeate our lives. How should we prepare for it? AI developer Tom Graham discusses the extraordinary power of this rapidly advancing technology, demoing cutting-edge examples -- including real-time face swaps and voice cloning -- live from the TED stage. In conversation with head of TED Chris Anderson, Graham digs into the creative potential of this hyperreal content (often referred to as "deepfakes") as well as its risk for exploitation and the new legal rights we'll need in order to maintain control over our photorealistic AI avatars.

Why are "good colleges" often the ones that accept the fewest students? Exposing the harmful consequences of society's obsession with highly rejective (and expensive) universities, educator Cecilia M. Orphan asks us to rethink what makes institutions "prestigious" and consider directing funds and attention to where they're needed most: regional public universities that serve all students. A call for schools to be judged by the opportunities they create -- not the ones they stifle.

Neurodiversity and innovation often go hand in hand, but does that mean visionary entrepreneurs get a free pass to say and do anything they want? Bonobos founder and mental health advocate Andy Dunn shares his experience navigating bipolar I in the midst of running a successful startup, offering lessons learned on his journey to wellness and steps to create a future where everyone is able to "dream crazy dreams" -- while being held accountable.

What if we could solve the climate and housing crises at the same time? Financial institutions have pledged trillions to transform the economy and accelerate climate action -- but right now, that money is not flowing at the speed it needs to, says sustainable investing expert Veronica Chau. Illuminating the links between climate change and affordable housing, she suggests a playbook of moves to start mobilizing big money and transform climate financing challenges into opportunities.

Will truth and reason survive the evolution of artificial intelligence? AI researcher Gary Marcus says no, not if untrustworthy technology continues to be integrated into our lives at such dangerously high speeds. He advocates for an urgent reevaluation of whether we're building reliable systems (or misinformation machines), explores the failures of today's AI and calls for a global, nonprofit organization to regulate the tech for the sake of democracy and our collective future. (Followed by a Q&A with head of TED Chris Anderson)

More than 30 million people in the US are eligible to have their arrest and conviction records cleared -- but most people who qualify either can't afford it or simply don't know it's an option. In this gripping talk, second chance advocate and 2023 Audacious Project grantee Sheena Meade makes the case for "clean slate" laws that streamline this complicated process, increasing access to work, housing and education opportunities for millions of people. Learn how her team at the Clean Slate Initiative has already helped pass these laws in six US states and how they're now working to unlock record clearance for millions more, so everyone can get a true shot at becoming their best selves. (This ambitious plan is a part of the Audacious Project, TED's initiative to inspire and fund global change.)

In this exclusive preview of groundbreaking, unreleased technology, former Apple designer and Humane cofounder Imran Chaudhri envisions a future where AI enables our devices to "disappear." He gives a sneak peek of his company's new product -- shown for the first time ever on the TED stage -- and explains how it could change the way we interact with tech and the world around us. Witness a stunning vision of the next leap in device design.

Keenan Scott Il's passion for words, stories and superheroes fueled his journey to becoming a celebrated playwright, producer, director and actor. Showing how language can illuminate the superhero in all of us, Scott performs three spoken word pieces that seamlessly weave together literary devices like simile, assonance and slant rhyme, sharing the talent he's cultivated despite the obstacles (read: kryptonite).

Scam artists know something about money that you don't -- and artist J Mase III is here to shed some light. From Elizabeth Holmes's false medical tech promises to Anna "Delvey" Sorokin's fake trust fund and more, Mase shares examples of infamous scams along with three crucial lessons on how money functions for the wealthy, why it flows in the direction it does and how to start spotting scams in your own life.

Sal Khan, the founder and CEO of Khan Academy, thinks artificial intelligence could spark the greatest positive transformation education has ever seen. He shares the opportunities he sees for students and educators to collaborate with AI tools -- including the potential of a personal AI tutor for every student and an AI teaching assistant for every teacher -- and demos some exciting new features for their educational chatbot, Khanmigo.

Computer scientist Yejin Choi is here to demystify the current state of massive artificial intelligence systems like ChatGPT, highlighting three key problems with cutting-edge large language models (including some funny instances of them failing at basic commonsense reasoning.) She welcomes us into a new era in which AI is becoming almost like a new intellectual species -- and identifies the benefits of building smaller AI systems trained on human norms and values. (Followed by a Q&A with head of TED Chris Anderson)

TikTok CEO Shou Chew dives into how the trend-setting video app and cultural phenomenon works — from what distinguishes its algorithm and drives virality to the challenges of content moderation and digital addiction. In a wide-ranging conversation with head of TED Chris Anderson, he tells stories about the TikTok creators he loves and digs into thorny issues like data privacy and government manipulation — as well as speaking personally about his commitment to inspiring creativity and building community.

In a talk from the cutting edge of technology, OpenAI cofounder Greg Brockman explores the underlying design principles of ChatGPT and demos some mind-blowing, unreleased plug-ins for the chatbot that sent shockwaves across the world. After the talk, head of TED Chris Anderson joins Brockman to dig into the timeline of ChatGPT's development and get Brockman's take on the risks, raised by many in the tech industry and beyond, of releasing such a powerful tool into the world.

Nearly 40 percent of humanity lives near a coast -- and no two coasts are the same. How can these communities build resilience to the increasing risks of climate change? Climate advisor Dave Sivaprasad outlines how to tackle this complex challenge through an approach that looks for the right mix of solutions to fit each local context, from restoring mangrove forests to building storm barriers and beyond.

As Arctic ice melts, polar bears are being forced on land -- and they're hungry. With the apex predators frequently turning to human junkyards for a snack, northern towns have had to get creative in order to keep both their people and wildlife safe. Biologist and conservationist Alysa McCall shares lessons from the field on how to safely navigate contact with these magnificent animals and plan for a future where climate change forces us all a little closer.

From the Salem witch trials to Jack the Ripper, humanity's historic fascination for true crime content can be traced back to the Middle Ages. But is it ethical to consume these real-life dramas in the way we do? Researcher Lindsey A. Sherrill shares four questions to ask yourself to be a mindful fan of this provocative cultural obsession -- so you can direct your attention away from the exploitative "ugly side" of true crime and to those that are doing useful work in the genre.

When it comes to cost, clean energy is bound to beat out fossil fuels, says technologist Ramez Naam. But the hesitancy to build amid the prevalence of "not in my backyard" campaigns is preventing the creation of our sustainable future. Naam outlines the changes we need to make to get out of our own way and create a stronger, more reliable renewable energy grid. "It is time for us to build," he says.

Women and girls with autism spectrum disorder often don't display the behaviors people typically associate with neurodivergence, greatly impacting when, how -- and if -- they are diagnosed. Autism acceptance advocate Kate Kahle makes the case for more research into this gender discrepancy, sharing her personal experience with masking, being diagnosed as a teenager and how it allowed her to better understand herself. "Autism is not a disease, and it doesn't need to be cured," she says. "It's just a different way some brains can work."

What are the realistic pathways off of fossil fuels and towards a world of abundant clean energy? TED Countdown gathered for its second Dilemma Series -- events designed to look at some of the tricky challenges of climate change, where diverging positions have stalled progress -- to answer this core question of the climate crisis. Through TED Talks and conversations with experts, activists and leading voices in the space, this film delves into the tension between the necessity to extricate ourselves from fossil fuels, which endanger our collective future, and the equally paramount necessity of a stable and secure supply of energy for everyone. (Featuring, in order of appearance: Catherine Abreu, Tessa Khan, Laurence Tubiana, Hisham Mundol, Hongqiao Liu, Rebekah Shirley, Vijaya Ramachandran, Zoë Knight, Mary Robinson, Lindsay Levin, David Biello, Adair Turner, Jérôme Schmitt, Ramez Naam, Tzeporah Berman, Luisa Neubauer, Emily Grubert and Jade Begay)

"My very first film was about a town that disappeared," says documentarian John Paget. It was the beginning of a lifelong fascination with cities and towns across the US that experienced slow-motion declines -- but managed to stage a comeback after an era of demise. From the closure of the iconic Route 66 to the roller-coaster history of Buffalo, New York, Paget reveals the power of sharing your town's "civic story" to spark local revitalization.

Middle school is a time like no other, as significant biological and emotional changes coincide with profound personal growth, says educator Jerome Hunter. The middle school for boys that he founded centers on a program that helps redefine masculinity through what he calls the three "Cs" -- confidence, communication and community. He shares the growth he's seen when boys are encouraged to explore their own empathy -- and how it could lead to a more just world.

We all experience it: that desire to do something wrong just for the sake of it. Whether it's walking on manicured grass or sticking your finger in a friend's ice cream, psychologist Paul Bloom invites us to see the clever, creative and beautiful side of these minor impulses to do bad. He dives into the psychology behind this all-too-human condition -- and proposes that it helps make our world a little more unpredictable and fun.

The emergence of data-driven mass surveillance "is threatening to turn privacy into a relic of the 20th century," says the anonymous YouTube creator known as Ordinary Things. Meanwhile, state-funded troll farms are spreading disinformation and curating chaos on platforms meant to connect us and revolutionize the way we live. Ordinary Things gives an enlightening account of the internet's strengths and weaknesses, warning that the fight for a free internet is a fight for our collective future.

What comes to mind when you think about the most fun moments of your life? Science journalist Catherine Price asked thousands of people across the world this question, and their answers led her to a new definition of "true" fun: a special confluence of playfulness, connection and flow. Hear her thoughts on why having fun is good for your mental and physical health and how to identify the tell-tale signs of "fake" fun -- as well as actionable tips for identifying what brings you joy. (This conversation, hosted by TED science curator David Biello, was part of an exclusive TED Membership event. Visit ted.com/membership to become a TED Member.)

Why aren't more people investing in Africa's green energy? Environmental researcher Rebekah Shirley outlines the continent's immense potential for renewable power and calls for collaborative international investment -- and partnership -- in Africa's climate future. "Let's cut past the talk and focus on unleashing the avalanche of a clean energy future that Africa is ready to deliver," says Shirley.

When programmer Tiffani Ashley Bell learned that thousands of people in Detroit were facing water shutoffs because they couldn't afford to pay their bills, she decided to take action -- in the simplest, most obvious way possible. It's an inspiring story of how one person with tenacity and an idea can create monumental change -- and a demonstration that each of us can find our own way to help the world, even if it means starting without all the answers.