A vegetable garden can do more than save you money -- it can save the world. In this talk, Roger Doiron shows how gardens can re-localize our food and feed our growing population.

Britta Riley wanted to grow her own food (in her tiny apartment). So she and her friends developed a system for growing plants in discarded plastic bottles -- researching, testing and tweaking the system using social media, trying many variations at once and quickly arriving at the optimal system. Call it distributed DIY. And the results? Delici...

Imagine playing a video game controlled by your mind. Now imagine that game also teaches you about your own patterns of stress, relaxation and focus. Ariel Garten shows how looking at our own brain activity gives new meaning to the ancient dictum "know thyself."

In a series of visual, animated love letters, designer Debbie Millman reflects on the things she's grateful for by exploring the wonders of her garden, New York City, travel and storytelling. "As we navigate through this crisis, I'm hopeful we will find some solace together," she says.

A whirlwind of energy and ideas, Stephen Ritz is a teacher in New York's tough South Bronx, where he and his kids grow lush gardens for food, greenery -- and jobs. Just try to keep up with this New York treasure as he spins through the many, many ways there are to grow hope in a neighborhood many have written off, or in your own.

A spinal cord injury can sever the communication between your brain and your body, leading to paralysis. Fresh from his lab, Grégoire Courtine shows a new method -- combining drugs, electrical stimulation and a robot -- that could re-awaken the neural pathways and help the body learn again to move on its own. See how it works, as a paralyzed rat...

There's nothing quite like a good night's sleep. What if technology could help us get more out of it? Dan Gartenberg is working on tech that stimulates deep sleep, the most regenerative stage which (among other wonderful things) might help us consolidate our memories and form our personalities. Find out more about how playing sounds that mirror ...

Ecologist Deborah Gordon studies ants wherever she can find them -- in the desert, in the tropics, in her kitchen ... In this fascinating talk, she explains her obsession with insects most of us would happily swat away without a second thought. She argues that ant life provides a useful model for learning about many other topics, including disea...

Deborah Gordon studies ant colonies in the Arizona desert to understand their complex social system. She asks: How do these chitinous creatures get down to business -- and even multitask when they need to -- with no language, memory or visible leadership? Her answers could lead to a better understanding of all complex systems, from the brain to ...

Dutch artist Piet Mondrian's abstract, rectangular paintings inspired mathematicians to create a two-fold challenge. Can you solve the puzzle and get to the lowest score possible? Gordon Hamilton shows how. [TED-Ed Animation by Anton Trofimov]

Join John Hardy on a tour of the Green School, his off-the-grid school in Bali that teaches kids how to build, garden, create (and get into college). The centerpiece of campus is the spiraling Heart of School, perhaps the world's largest freestanding bamboo building.

If you are a living, breathing human being, chances are you have felt sad at least a few times in your life. But what exactly is melancholy, and what (if anything) should we do about it? Courtney Stephens details our still-evolving understanding of sadness -- and even makes a case for its usefulness. [Directed by Sharon Colman Graham, narrated b...

Can the interests of an individual nation be reconciled with humanity's greater good? Can a patriotic, nationally elected politician really give people in other countries equal consideration? Following his TEDTalk calling for a global ethic, UK Prime Minister Gordon Brown fields questions from TED Curator Chris Anderson.

Ants have one of the most complex social organizations in the animal kingdom; they live in structured colonies that contain different types of members who perform specific roles. Sound familiar? Deborah M. Gordon explains the way these incredible creatures mate, communicate and source food, shedding light on how their actions can mimic and infor...

Jamila Gordon believes in the power of human connection -- and artificial intelligence -- to help people who might otherwise be left behind. Telling the story of her own path from refugee to global tech executive, she shows how AI is helping refugees, migrants and those from disadvantaged backgrounds find jobs and develop the skills they need to...

Employee diversity and inclusive leadership are goals for most organizations today, but how do we get there? Try a "reverse mentorship" program, which sets up junior team members to guide senior staff. Here are 6 tips to make reverse mentorship work, from executive coach and personal development advocate Patrice Gordon.

We're at a unique moment in history, says UK Prime Minister Gordon Brown: we can use today's interconnectedness to develop our shared global ethic -- and work together to confront the challenges of poverty, security, climate change and the economy.

People don't just cook anymore -- they're cooking, texting, talking on the phone, watching YouTube and uploading photos of the awesome meal they just made. Designer Paolo Cardini questions the efficiency of our multitasking world and makes the case for -- gasp -- "monotasking."

The US economy has been expanding wildly for two centuries. Are we witnessing the end of growth? Economist Robert Gordon lays out 4 reasons US growth may be slowing, detailing factors like epidemic debt and growing inequality, which could move the US into a period of stasis we can't innovate our way out of. Be sure to watch the opposing viewpoin...

Blogger Courtney E. Martin examines the perennially loaded word "feminism" in this personal and heartfelt talk. She talks through the three essential paradoxes of her generation's quest to define the term for themselves.

Joseph Gordon-Levitt has gotten more than his fair share of attention from his acting career. But as social media exploded over the past decade, he got addicted like the rest of us -- trying to gain followers and likes only to be left feeling inadequate and less creative. In a refreshingly honest talk, he explores how the attention-driven model ...

For the first time in history, the majority of American parents don't think their kids will be better off than they were. This shouldn't be a cause for alarm, says journalist Courtney E. Martin. Rather, it's an opportunity to define a new approach to work and family that emphasizes community and creativity. "The biggest danger is not failing to ...

Have you ever felt your throat closing up during a presentation, or your voice getting shaky during a stressful exchange with your boss? Speech pathologist Jackie Gartner-Schmidt shares the anatomical processes that cause our voices to betray our anxiety -- and some easy, practical ways to alleviate those telltale vocal tremors.

After many adventures in Wonderland, Alice has once again found herself in the court of the temperamental Queen of Hearts. She's about to pass through the garden undetected, when she overhears the king and queen arguing that 64 is the same as 65. Can Alice prove the queen wrong and escape unscathed? Alex Gendler shows how. [Directed by Artrake S...

What should a community do with its unused land? Plant food, of course. With energy and humor, Pam Warhurst tells at the TEDSalon the story of how she and a growing team of volunteers came together to turn plots of unused land into communal vegetable gardens, and to change the narrative of food in their community.

Paralyzed by a stroke, Henry Evans uses a telepresence robot to take the stage and show how new robotics, tweaked and personalized by a group called Robots for Humanity, help him live his life to the full. He shows off a nimble little quadrotor drone, created by a team led by Chad Jenkins, that gives him the ability to once again stroll a garden...

Urban planner Ryan Gravel shares the story of how his hometown of Atlanta, Georgia, rallied to build a massive urban park that will transform an abandoned railroad track into 22 miles of public green space called the Atlanta BeltLine. The places we live aren't inevitable, he says -- and if we want something different, we need to speak up.

Ron Finley plants vegetable gardens in South Central LA -- in abandoned lots, traffic medians, along the curbs. Why? For fun, for defiance, for beauty and to offer some alternative to fast food in a community where "the drive-thrus are killing more people than the drive-bys."

Researcher Kamal Meattle shows how an arrangement of three common houseplants, used in specific spots in a home or office building, can result in measurably cleaner indoor air.

David Byrne sings the Talking Heads' 1988 hit, "(Nothing But) Flowers." He's accompanied by Thomas Dolby and string quartet Ethel, who made up the TED2010 house band.