These powerful talks offer ideas for rethinking—and hopefully stopping—the spread of HIV and AIDS.

Bono picks 8 talks that express powerful ideas -- and shares exactly why each needs to be spread far and wide.

Viruses mutate and spread from person to person, a dynamic process that often leaves us playing catch-up when there's a new disease outbreak. What if vaccines worked the same way? Virologist Leor Weinberger shares a scientific breakthrough: "hijacker therapy," a type of medical treatment that could attack, modify and spread alongside a virus, po...

From Twitter to word of mouth, explore the ways ideas spread so quickly from person to person.

Cynthia Schneider looks at two international "American Idol"-style shows -- one in Afghanistan, and one in the United Arab Emirates -- and shows the surprising effect that these reality-TV competitions are creating in their societies.

Why do people distrust vaccines? Anthropologist Heidi Larson explores how medical rumors originate, spread and fuel resistance to vaccines worldwide. While vaccines cannot escape the "political and social turbulence" that surrounds them, she says, the first step to stopping the spread of disease is to talk to people, listen and build trust.

In a world of too many options and too little time, our obvious choice is to just ignore the ordinary stuff. Marketing guru Seth Godin spells out why, when it comes to getting our attention, bad or bizarre ideas are more successful than boring ones.

Could human civilization eventually spread across the whole Milky Way galaxy? Could we move beyond our small, blue planet to establish colonies in the multitude of star systems out there? These questions are pretty daunting, but their (theoretical) answers were actually put forth decades ago. Roey Tzezana describes the conceptual von Neumann mac...

A casual reverse-image search unleashed a nightmarish reality on Noelle Martin when she discovered her face edited into pornographic materials across the internet. Join Martin as she recounts years battling shadowy online figures to reclaim her identity, narrative and peace of mind -- and learn how she helped change Australian law. (This talk co...

How does the metaphorical lightbulb go off? Is it a flash of genius? The power of crowds? These heady talks explore the nature of ideas themselves: Where they come from, how they evolve, and how each of us can nurture them.

Paola Antonelli, design curator at New York's Museum of Modern Art, wants to spread her appreciation of design -- in all shapes and forms -- around the world.

Author Jennifer 8. Lee explains how the chopstick spread from the East to the West -- and was designed to give you the perfect bite.

Armed with bracing logic, wit and her "public-health nerd" glasses, Elizabeth Pisani reveals the myriad of inconsistencies in today's political systems that prevent our dollars from effectively fighting the spread of HIV. Her research with at-risk populations -- from junkies in prison to sex workers on the street in Cambodia -- demonstrates the ...

Emily Oster re-examines the stats on AIDS in Africa from an economic perspective and reaches a stunning conclusion: Everything we know about the spread of HIV on the continent is wrong.

(Update: the CDC and international science community urge everyone to wear face coverings in public.) Where did the new coronavirus originate, how did it spread so fast -- and what's next? Sharing insights from the outbreak, global health expert and TED Fellow Alanna Shaikh traces the spread of COVID-19, discusses why travel restrictions aren't ...

Hey, remote control mavericks. Enjoy these talks, full of thoughts on how TV shows pique our fascination and reflect our cultural values.

Accepting the 2006 TED Prize, Dr. Larry Brilliant talks about how smallpox was eradicated from the planet, and calls for a new global system that can identify and contain pandemics before they spread.

Why do transnational extremist organizations succeed where democratic movements have a harder time taking hold? Maajid Nawaz, a former Islamist extremist, asks for new grassroots stories and global social activism to spread democracy in the face of nationalism and xenophobia.

Patricia Ryan is a longtime English teacher who asks a provocative question: Is the world's focus on English preventing the spread of great ideas in other languages? In other words: What if Einstein had to pass the TOEFL? It's a passionate defense of translating and sharing ideas.

There is an epidemic of HIV, and with it an epidemic of bad laws -- laws that effectively criminalize being HIV positive. At the TEDxSummit in Doha, TED Fellow Shereen El-Feki gives a forceful argument that these laws, based in stigma, are actually helping the disease spread.

Each year, hundreds of thousands of people around the world die of malaria. Aided by a demo from Freya the malaria-sniffing dog, infectious disease researcher James Logan describes the role of scent in the spread of malaria and explains how dogs can help break that cycle.

In this visually dazzling talk, Jonathan Drori shows the extraordinary ways flowering plants -- over a quarter million species -- have evolved to attract insects to spread their pollen: growing 'landing-strips' to guide the insects in, shining in ultraviolet, building elaborate traps, and even mimicking other insects in heat.

Where did Zika come from, and what can we do about it? Molecular biologist Nina Fedoroff takes us around the world to understand Zika's origins and how it spread, proposing a controversial way to stop the virus -- and other deadly diseases -- by preventing infected mosquitoes from multiplying.

When cancer cells are closely packed together in a tumor, they're able to communicate with each other and coordinate their movement throughout the body. What if we could interrupt this process? In this accessible talk about cutting-edge science, Hasini Jayatilaka shares her work on an innovative method to stop cancer cells from communicating -- ...

We're all embedded in vast social networks of friends, family, co-workers and more. Nicholas Christakis tracks how a wide variety of traits -- from happiness to obesity -- can spread from person to person, showing how your location in the network might impact your life in ways you don't even know.

Explore some cultural phenomenons from across the globe. Some touching, some silly — and all very intriguing.

Having your period is exhausting -- and for many people across the world, menstruation is even more challenging because of stigmas and difficulty getting basic hygiene supplies, says social activist Ananya Grover. In this uplifting, actionable talk, she shares how "Pravahkriti," her campaign to spread period positivity, creatively engages with e...

How can we stop the spread of misleading, sometimes dangerous content while maintaining an internet with freedom of expression at its core? Misinformation expert Claire Wardle explores the new challenges of our polluted online environment and maps out a plan to transform the internet into a place of trust -- with the help everyday users. "Togeth...

After mapping humans' intricate social networks, Nicholas Christakis and colleague James Fowler began investigating how this information could better our lives. Now, he reveals his hot-off-the-press findings: These networks can be used to detect epidemics earlier than ever, from the spread of innovative ideas to risky behaviors to viruses (like ...

When artist Damon Davis went to join the protests in Ferguson, Missouri, after police killed Michael Brown in 2014, he found not only anger but also a sense of love for self and community. His documentary "Whose Streets?" tells the story of the protests from the perspective of the activists who showed up to challenge those who use power to sprea...