Could we use the energy from light and sound to detect disease? TED Fellow Lei Li shares the exciting promise of photoacoustic imaging: an affordable, painless and accurate method of converting light into sound in order to create high-resolution images of what's going on inside our bodies. From early detection of breast cancer to steering medici...

When a very young child looks at a picture, she can identify simple elements: "cat," "book," "chair." Now, computers are getting smart enough to do that too. What's next? In a thrilling talk, computer vision expert Fei-Fei Li describes the state of the art -- including the database of 15 million photos her team built to "teach" a computer to un...

In the beginning of the universe, all was darkness — until the first organisms developed sight, which ushered in an explosion of life, learning and progress. AI pioneer Fei-Fei Li says a similar moment is about to happen for computers and robots. She shows how machines are gaining "spatial intelligence" — the ability to process visual data, make...

In this whimsical talk and live demo, scientist Li Wei Tan shares the secrets of bubbles -- from their relentless pursuit of geometric perfection to their applications in medicine and shipping, where designers are creating more efficient vessels by mimicking the bubbles created by swimming penguins. Learn more about these mathematical marvels an...

How do we explain the unexplainable? This question has inspired numerous myths, religious practices and scientific inquiries. But Zen Buddhists practicing throughout China from the 9th to 13th century asked a different question – why do we need an explanation? Puqun Li details the bewildering and ambiguous philosophical thought experiments these...

(NOTE: This talk was given in 2010, and this field of science has developed quickly since then. Enjoy it as a piece of science history but not as the last word on this topic. Read "Corrections & Updates" below for more details.) William Li presents a new way to think about treating cancer and other diseases: anti-angiogenesis, preventing the...

In a talk that could change how you see things, designer and artist Jiabao Li introduces her conceptual projects that expose the inherent bias of digital media. From a helmet that makes you "allergic" to the color red to a browser plug-in that filters the internet in an unexpected way, Li's creations uncover how technology mediates the way we pe...

In business today, the need for innovation and rapid decision-making trumps yesterday's drive for efficiency. How does this influence what it means to be an effective leader? Charlene Li explains that it's less about control and more about empowerment: enabling employees to acquire the information they need, so they can make their own decisions.

What if we could use brain waves to treat Alzheimer's? Professor and neuroscientist Li-Huei Tsai details a promising new approach to artificially stimulate gamma brain waves using light and sound therapy, to increase connectivity and synchrony and delay the onset of this deadly disease. This non-invasive therapy has already been shown to work in...

It's a standard assumption in the West: As a society progresses, it eventually becomes a capitalist, multi-party democracy. Right? Eric X. Li, a Chinese investor and political scientist, begs to differ. In this provocative, boundary-pushing talk, he asks his audience to consider that there's more than one way to run a successful modern nation.

Tan Le's astonishing new computer interface reads its user's brainwaves, making it possible to control virtual objects, and even physical electronics, with mere thoughts (and a little concentration). She demos the headset, and talks about its far-reaching applications.

In 2010, technologist Tan Le took the TEDGlobal stage to demo a powerful new interface. But now, at TEDxWomen, she tells a very personal story: the story of her family -- mother, grandmother and sister -- fleeing Vietnam and building a new life.

Brain research is something typically done in a hospital or lab, taking a look at a patient experiencing some sort of brain irregularity. Tan Le demonstrates how we can take a different approach to better understand the way the brain works in everyday situations.

In the 1860's, 11 southern states withdrew from the United States and formed the Confederacy. They seceded in response to the growing movement for the nationwide abolition of slavery. Yet barely a year after the Civil War ended, southern sources began claiming the conflict was about state's rights. How did this revisionist history come about? Ka...

As the creator of a large chunk of the Marvel Universe, Stan Lee knows a thing or two about conjuring new superheroes from thin air. In this instructional and charmingly idiosyncratic talk, Lee shares a few lessons on how to write your own superpowered characters and deploy them in stories that connect with the largest possible audience.

When you think of telecommuting, you might think of a remote colleague's face in a tiny square on a screen. But with Jinha Lee's augmented reality platform, Spatial, distant coworkers can now teleport as digital avatars into a shared virtual space. Check out the incredible potential and possibilities for colleagues on different continents or in ...

We've all heard that robots are going to take our jobs -- but what can we do about it? Innovation expert David Lee says that we should start designing jobs that unlock our hidden talents and passions -- the things we spend our weekends doing -- to keep us relevant in the age of robotics. "Start asking people what problems they're inspired to sol...

Can a person disappear in plain sight? That's the question Liu Bolin's remarkable work seems to ask. The Beijing-based artist is sometimes called "The Invisible Man" because in nearly all his art, Bolin is front and center — and completely unseen. He aims to draw attention to social and political issues by dissolving into the background.

The biblical story of the heroine Judith slaying the brutal Holofernes is featured in countless works of art, including the Sistine Chapel. But the most iconic depiction was painted by an artist who tackled this ambitious scene when she was just 19 years old. Her name was Artemisia Gentileschi. So who was Artemisia, and what sets her depiction a...

From Hong Kong, South China Morning Post CEO Gary Liu tracks China's response to the coronavirus pandemic -- from the initial outbreak in Wuhan to the shutdown of Hubei province and the containment measures taken across its major cities. Sharing insights into how the culture in places like Hong Kong and South Korea contributed to fast action aga...

TV news anchor Lee Thomas thought his career was over after he was diagnosed with vitiligo, an autoimmune disorder that left large patches of his skin without pigment and led to derision and stares. In a captivating talk, he shares how he discovered a way to counter misunderstanding and fear around his appearance with engagement, dialogue -- and...

Most of us know Bruce Lee as the famous martial artist and action film star -- but he was also a philosopher who taught "self-actualization": the practice of how to be yourself in the best way possible. In this inspiring talk, Bruce's daughter Shannon Lee takes us inside the mind of her father, exploring how to use his philosophy in your daily l...

In March 2009, North Korean soldiers captured journalist Euna Lee and her colleague Laura Ling while they were shooting a documentary on the border with China. The courts sentenced them to 12 years of hard labor, but American diplomats eventually negotiated their release. In this surprising, deeply human talk, Lee shares her experience living as...

Science columnist Lee Hotz describes a remarkable project at WAIS Divide, Antarctica, where a hardy team are drilling into ten-thousand-year-old ice to extract vital data on our changing climate.

Building sophisticated educational tools out of cheap parts, Johnny Lee demos his cool Wii Remote hacks, which turn the $40 video game controller into a digital whiteboard, a touchscreen and a head-mounted 3-D viewer.

What if you could take a smell selfie, a smelfie? What if you had a lipstick that caused plants to grow where you kiss? Ani Liu explores the intersection of technology and sensory perception, and her work is wedged somewhere between science, design and art. In this swift, smart talk, she shares dreams, wonderings and experiments, asking: What ha...

Smartwatches are powerful computers, but too imprecise for medical use; doctors still need to spend valuable time taking measurements with specialized equipment. Biomechnical engineer Nanshu Lu explains why rigid electronics just don’t work well with our soft, pliable skin–and how her flexible, tattoo-like sensors are changing the future of at-h...

The border between our physical world and the digital information surrounding us has been getting thinner and thinner. Designer and engineer Jinha Lee wants to dissolve it altogether. As he demonstrates in this short, gasp-inducing talk, his ideas include a pen that penetrates into a screen to draw 3D models and SpaceTop, a computer desktop prot...

Good design looks great, yes -- but why shouldn't it also feel great, smell great and sound great? Designer Jinsop Lee (a TED Talent Search winner) shares his theory of 5-sense design, with a handy graph and a few examples. His hope: to inspire you to notice great multisensory experiences.

Every day, we move and operate within systems of power that other people have constructed. But we're often uncomfortable talking about power. Why? Eric Liu describes the six sources of power and explains how understanding them is key to being an effective citizen.