What can you hear in silence? In this exploration of sound, host of the podcast "Twenty Thousand Hertz" Dallas Taylor tells the story of arguably the most debated musical composition in recent history -- composer John Cage's iconic piece 4'33" -- and invites you to take notice of the soundscape around you. Watch to the end to experience a performance of 4'33''.

TED Talks Daily

What silence can teach you about sound | Dallas Taylor

At age 16, journalist and filmmaker Jose Antonio Vargas found out he was in the United States illegally. Since then, he's been thinking deeply about immigration and what it means to be a US citizen -- whether it's by birth, law or otherwise. In this powerful talk, Vargas calls for a shift in how we think about citizenship and encourages us all to reconsider our personal histories by answering three questions: Where did you come from? How did you get here? Who paid?

3 questions to ask yourself about US citizenship | Jose Antonio Vargas

We have archives of films, newspapers, even seeds -- what if we could make one for the entire surface of the earth? Drawing on his experience mapping an ancient city in the Honduran jungle, archaeologist Chris Fisher makes the case for scanning the whole planet with LiDAR -- a technology that uses lasers shot from an airplane to map the ground -- in order to preserve our cultural and ecological heritage.

Let's scan the whole planet with LiDAR | Chris Fisher

"In a world" -- our world -- movie trailers have undergone a massive evolution. The booming voice-of-God narration of the '80s and '90s has been silenced in favor of boojes and bwaas. In this episode of Twenty Thousand Hertz, host and sound design expert Dallas Taylor is joined by guests who share the history of trailers and a hilarious takedown of the sounds and dialogue that are common in the modern trailer style. You'll never be able to watch a blockbuster trailer the same way again. Twenty Thousand Hertz, a podcast revealing the stories behind the world's most recognizable and interesting sounds, is a new member of the TED family of podcasts. Listen or subscribe wherever you get your podcasts.

How every movie trailer gets made | Twenty Thousand Hertz

In a talk about understanding and practicing the art of healthy relationships, Katie Hood reveals the five signs you might be in an unhealthy relationship -- with a romantic partner, a friend, a family member -- and shares the things you can do every day to love with respect, kindness and joy. "While love is an instinct and an emotion, the ability to love better is a skill we can all build and improve on over time," she says.

The difference between healthy and unhealthy love | Katie Hood

Want to learn a new language but feel daunted or unsure where to begin? You don't need some special talent or a "language gene," says Lýdia Machová. In an upbeat, inspiring talk, she reveals the secrets of polyglots (people who speak multiple languages) and shares four principles to help unlock your own hidden language talent -- and have fun while doing it.

The secrets of learning a new language | Lýdia Machová

As kids, we all get advice from parents and teachers that seems strange, even confusing. This was crystallized one night for a young Clint Smith, who was playing with water guns in a dark parking lot with his white friends. In a heartfelt piece, the poet paints the scene of his father's furious and fearful response.

How to raise a black son in America | Clint Smith

On this episode of ZigZag, host Manoush Zomorodi is joined by Eric Ries, who went from writing Silicon Valley's bible to building a stock market for social justice. Together, they examine why quarterly earnings reports cause anti-social behavior and how a new stock exchange in the US might present a systemic solution. As Eric says, this "will serve as inspiration to a new generation of civic entrepreneurs who will say: We don't have to take the institutions of our society as a given. We could try to build new and better ones." ZigZag, the business show about being human, is now a member of the TED family of podcasts. Listen or subscribe wherever you get your podcasts.

A stock market for social justice | ZigZag

Nearly 400 years ago, a tiny town in Germany made a bargain with God: spare its people from the Black Plague and we'll put on a play in your honor... forever. And it worked! Now every decade, the entire town comes together to stage the play, drawing massive crowds to one of the largest religious spectacles in the world. But problematic parts of the play have been challenged, and tensions rise when a new voice tries to update a 2,000-year-old story with help from some unexpected allies. (Audio only)

Rewriting the script(ure) | Pindrop

You use your brain's executive function every day -- it's how you do things like pay attention, plan ahead and control impulses. Can you improve it to change for the better? With highlights from her research on child development, cognitive scientist Sabine Doebel explores the factors that affect executive function -- and how you can use it to break bad habits and achieve your goals.

How your brain's executive function works -- and how to improve it | Sabine Doebel

Our biases can be dangerous, even deadly — as we've seen in the cases of Michael Brown in Ferguson, Missouri, and Eric Garner, in Staten Island, New York. Diversity advocate Vernā Myers looks closely at some of the subconscious attitudes we hold toward out-groups. She makes a plea to all people: Acknowledge your biases. Then move toward, not away from, the groups that make you uncomfortable. In a funny, impassioned, important talk, she shows us how.

How to overcome our biases? Walk boldly toward them | Vernā Myers

Things are pretty shocking out there right now -- record-breaking storms, deadly terror attacks, thousands of migrants disappearing beneath the waves and openly supremacist movements rising. Are we responding with the urgency that these overlapping crises demand from us? Journalist and activist Naomi Klein studies how governments use large-scale shocks to push societies backward. She shares a few propositions from "The Leap" -- a manifesto she wrote alongside indigenous elders, climate change activists, union leaders and others from different backgrounds -- which envisions a world after we've already made the transition to a clean economy and a much fairer society. "The shocking events that fill us with dread today can transform us, and they can transform the world for the better," Klein says. "But first we need to picture the world that we're fighting for. And we have to dream it up together."

How shocking events can spark positive change | Naomi Klein

Marine biologist, fish ecologist and self-confessed ocean optimist Steve Simpson explains the intricate sounds that exist in our oceans -- and why listening to this soundtrack can help us protect it. This talk was filmed at TEDxExeter. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. With TED's podcast TEDx SHORTS, start each day with short, eye-opening ideas from some of the world's greatest TEDx speakers. Listen or subscribe wherever you get your podcasts.

The secret soundtrack of the sea | TEDx SHORTS

Civil rights leader and longtime US congressman John Lewis spent his life fighting for freedom and justice for everyone. In this illuminating conversation with lawyer and activist Bryan Stevenson, Lewis discusses the essential importance of voting, shares encouraging words of wisdom for the generation of young people currently organizing in the struggle for racial justice and tells moving stories from his decades of making "good trouble" -- at the Freedom Rides, March on Washington and in the halls of Congress. "When you see something that's not right or fair or just, you have to say something," Lewis says. "You have to do something." (This conversation is part of the TED Legacy Project. Recorded November 19, 2019)

The fight for civil rights and freedom | John Lewis and Bryan Stevenson

Far-UVC light is a type of ultraviolet light that kills microbes and viruses and, crucially, seems to be safe to use around humans. Radiation scientist David Brenner describes how we could use this light to stop the spread of SARS-CoV-2, the virus responsible for COVID-19, in hospitals, nursing homes, trains and other public indoor spaces -- paving the way for a potentially game-changing tool in the fight against the coronavirus pandemic. (This virtual conversation, hosted by TED science curator David Biello, was recorded July 7, 2020.)

Can light stop the coronavirus? | David Brenner

Every weekday, TED Talks Daily brings you the latest talks in audio. Join host and journalist Elise Hu for thought-provoking ideas on every subject imaginable — from Artificial Intelligence to Zoology, and everything in between — given by the world's leading thinkers and creators. With TED Talks Daily, find some space in your day to change your perspectives, ignite your curiosity, and learn something new.

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