"We start this new decade knowing that it is the most consequential period in history," says Prince William, The Duke of Cambridge. Inspired by President John F. Kennedy's "Moonshot," he calls on us all to rise to our greatest challenge ever: the "Earthshot." A set of ambitious objectives for the planet, the Earthshot goals seek to protect and r...

From Beyoncé to Drake and beyond, the world is rocking to the rhythm of Afrobeat. Feel the music as Kenyan afro-pop superstars Sauti Sol take the TED stage to perform three songs: "Live and Die in Afrika," "Sura Yako" and "Kuliko Jana."

Niti Bhan studies business strategy for Africa's informal markets: the small shops and stands, skilled craftspeople and laborers who are the invisible engine that keeps the continent's economy running. It's tempting to think of these workers as tax-dodgers, even criminals -- but Bhan makes the case that this booming segment of the economy is leg...

Once homebound by epilepsy, mental health advocate Sitawa Wafula found her strength in writing about it. Now, she advocates for others who are yet to find their voices, cutting through stigma and exclusion to talk about what it's like to live with the condition.

What's the best way to get people to change their behavior? In this funny, information-packed talk, psychologist Dan Ariely explores why we make bad decisions even when we know we shouldn't -- and discusses a couple tricks that could get us to do the right thing (even if it's for the wrong reason).

Dan Barasch and James Ramsey have a crazy plan — to create a park, filled with greenery, underneath New York City. The two are developing the Lowline, an underground greenspace the size of a football field. They're building it in a trolley terminal abandoned in 1948, using technology that harvests sunlight above-ground and directs it down below....

T. Morgan Dixon and Vanessa Garrison, founders of the health nonprofit GirlTrek, are on a mission to reduce the leading causes of preventable death among Black women -- and build communities in the process. How? By getting one million women and girls to prioritize their self-care, lacing up their shoes and walking in the direction of their healt...

Humanity now has incredible power to shape nature and the Earth: the power to destroy and the power to repair, says sustainability champion and UNDP Administrator Achim Steiner. In this action-oriented talk, Steiner shows how this power is putting our own survival at risk -- and takes us on a global tour of individuals and societies that are cho...

'I am a mathematician, and I would like to stand on your roof.' That is how Ron Eglash greeted many African families he met while researching the fractal patterns he'd noticed in villages across the continent.

While living and working as a marine biologist in Maldives, Charles Anderson noticed sudden explosions of dragonflies at certain times of year. He explains how he carefully tracked the path of a plain, little dragonfly called the globe skimmer, only to discover that it had the longest migratory journey of any insect in the world.

Halima Aden made history when she became the first hijab-wearing model on the cover of Vogue magazine. Now she returns to Kenya's Kakuma Refugee Camp -- where she was born and lived until the age of seven -- to share an inspiring message about what she's learned on the path from child refugee to international model.

French street artist JR uses his camera to show the world its true face, by pasting photos of the human face across massive canvases. At TED2011, he makes his audacious TED Prize wish: to use art to turn the world inside out.

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...

Jacqueline Novogratz tells a moving story of an encounter in a Nairobi slum with Jane, a former prostitute, whose dreams of escaping poverty, of becoming a doctor and of getting married were fulfilled in an unexpected way.

The disastrous earthquake in Haiti taught humanitarian groups an unexpected lesson: the power of mobile devices to coordinate, inform and guide relief efforts. At TEDxRC2, Paul Conneally shows extraordinary examples of social media and other technologies becoming central to humanitarian aid.

Eve Ensler, creator of "The Vagina Monologues," shares how a discussion about menopause with her friends led to talking about all sorts of sexual acts onstage, waging a global campaign to end violence toward women and finding her own happiness.

Perhaps you’ve punched out a paper doll or folded an origami swan? TED Fellow Manu Prakash and his team have created a microscope made of paper that's just as easy to fold and use. A sparkling demo that shows how this invention could revolutionize healthcare in developing countries … and turn almost anything into a fun, hands-on science experiment.

Myriam Sidibe is a warrior in the fight against childhood disease. Her weapon of choice? A bar of soap. For cost-effective prevention against sickness, it’s hard to beat soapy hand-washing, which cuts down risk of pneumonia, diarrhea, cholera and worse. Sidibe, a public-health expert, makes a smart case for public-private partnerships to promote...

During the financial crisis, the central banks of the United States, United Kingdom and Japan created $3.7 trillion in order to buy assets and encourage investors to do the same. Michael Metcalfe offers a shocking idea: could these same central banks print money to ensure they stay on track with their goals for global aid? Without risking inflat...

Nearly 800 million people worldwide depend on cassava for survival -- but this critical food source is under attack by entirely preventable viruses, says computational biologist and TED Senior Fellow Laura Boykin. She takes us to the farms in East Africa where she's working with a diverse team of scientists to help farmers keep their crops healt...

In this ode to design renegades, Alice Rawsthorn highlights the work of unlikely heroes, from Blackbeard to Florence Nightingale. Drawing a line from these bold thinkers to some early modern visionaries like Buckminster Fuller, Rawsthorn shows how the greatest designers are often the most rebellious.

What the astronauts felt when they saw Earth from space changed them forever. Author and artist Benjamin Grant aims to provoke this same feeling of overwhelming scale and beauty in each of us through a series of stunning satellite images that show the effects human beings are having on the planet. "If we can adopt a more expansive perspective, e...

Business in Africa is booming -- but international companies are missing out, says emerging markets expert Nomava Zanazo. Rushing in without knowing their customers, businesses underestimate Africans and make costly assumptions about their diversity, preferences and buying power. Sharing the basics about what companies need to know to succeed on...

Our food systems have not been designed to adapt to major disruptions like climate change, says environmental journalist Amanda Little. In this eye-opening talk, she shows how the climate crisis could devastate our food supply -- and introduces us to the farmers, entrepreneurs and engineers who are radically rethinking what we grow and how we ea...

George Steinmetz's spectacular photos show Africa from the air, taken from the world's slowest, lightest aircraft. Join Steinmetz to discover the surprising historical, ecological and sociopolitical patterns that emerge when you go low and slow in a flying lawn chair.

If architect and writer John Cary has his way, women will never need to stand in pointlessly long bathroom lines again. Lines like these are representative of a more serious issue, Cary says: the lack of diversity in design that leads to thoughtless, compassionless spaces. Design has a unique ability to dignify and make people feel valued, respe...

Today's refugee crisis is the biggest since World War II, and it's growing. When this talk was given, 50 million people had been forcefully displaced from their homes by conflict and war; as of 2021, the number grew to more than 82 million. There were three million Syrian refugees in 2014; now there are 5.5 million languishing in neighboring cou...

"Globalization is on its deathbed," says economist Mike O'Sullivan. The question now is: What's next? Tracing the historical successes and failures of globalization, O'Sullivan forecasts a new world order where countries come together over shared values rather than geography. Learn how big regional powers like the United States and China will be...

Dr. Gary Slutkin spent a decade fighting tuberculosis, cholera and AIDS epidemics in Africa. When he returned to the US, he thought he'd escape brutal epidemic deaths. But he began to look more carefully at gun violence -- whose spread follows the same pattern as an infectious disease. His conclusion: We've reversed the impact of so many disease...

"Lies are more engaging online than truth," says former CIA analyst, diplomat and Facebook employee Yaël Eisenstat. "As long as [social media] algorithms' goals are to keep us engaged, they will feed us the poison that plays to our worst instincts and human weaknesses." In this bold talk, Eisenstat explores how social media companies like Facebo...