TikTok content creator Taylor Cassidy has a hot take: going viral won't necessarily change the world. Inviting us to rethink what it means to be successful online, she shares how to retain your voice on social media -- and reminds us all where true impact lies.

What can we make of a design that shows up over and over in disparate cultures throughout history? Theorist Terry Moore explores "Penrose tiling" -- two shapes that fit together in infinite combinations without ever repeating -- and ponders what it might mean.

Based on her work for a CIA task force aimed at predicting civil wars, political scientist Barbara F. Walter examines the rise in extremism and threats to democracies around the globe -- and paints an unsettling picture of the increasing likelihood of a second civil war in the United States.

Could the tech industry's complex algorithms support people during their darkest times, rather than just deliver targeted ads? Drawing from his own experience with depression, global mental health researcher Sandersan Onie shows how internet search behaviors can provide valuable insights into suicide risk and potentially help save lives by reaching people in a deeply personal way, at a crucial moment.

What happens when human and machine creativity meet? From an AI model trained on classic works to generate a seemingly infinite stream of portraits to a neural network that envisions otherworldly life-forms in impossible detail, media art curator Eileen Isagon Skyers showcases mind-bending art that embraces our increasingly technological future, showing how AI can stretch the scope of human imagination and help create worlds we could never design alone.

How can we move past society's inclination to box people in with binary thinking and labels? Social work professor Jioji Ravulo believes we need to embrace multiplicity, exploring how Indigenous perspectives can help create more welcoming, collective communities for everyone.

Is there a way to give back that benefits everyone? Citing the success of collective giving practices from around the world, philanthropic advisor Rebecca Darwent asks donors to let communities lead decision-making, ushering in a new era of philanthropy that's rooted in interconnected humanity.

In an astonishing talk and tech demo, neurotechnologist Conor Russomanno shares his work building brain-computer interfaces that could enable us to control the external world with our minds. He discusses the quickly advancing possibilities of this field -- including the promise of a "closed-loop system" that could both record and stimulate brain activity -- and invites neurohacker Christian Bayerlein onto the TED stage to fly a mind-controlled drone by using a biosensing headset.