Two murders sat unexplained and unsolved -- until reporter Paul Lewis starting talking to bystanders who had evidence on their mobile phones. Step by step, Lewis pieced together their evidence and their stories to find justice for the victims. It's the future of investigative journalism, powered by the crowd.
"Babies and young children are like the R&D division of the human species," says psychologist Alison Gopnik. Her research explores the sophisticated intelligence-gathering and decision-making that babies are really doing when they play.
Conductor Charles Hazlewood talks about the role of trust in musical leadership -- then shows how it works, as he conducts the Scottish Ensemble onstage. He also shares clips from two musical projects: the opera "U-Carmen eKhayelitsha" and the ParaOrchestra.
Less than 10% of plastic trash is recycled -- compared to almost 90% of metals -- because of the massively complicated problem of finding and sorting the different kinds. Frustrated by this waste, Mike Biddle has developed a cheap and incredibly energy efficient plant that can, and does, recycle any kind of plastic.
How do we search for alien life if it's nothing like the life that we know? Christoph Adami shows how he uses his research into artificial life -- self-replicating computer programs -- to find a signature, a "biomarker," that is free of our preconceptions of what life is.
Yang Lan, a journalist and entrepreneur who's been called "the Oprah of China," offers insight into the next generation of young Chinese citizens -- urban, connected (via microblogs) and alert to injustice.
Can opera be ever-so-slightly sexy? The glorious soprano Danielle de Niese shows how, singing the flirty "Meine Lippen, sie küssen so heiss." Which, translated, means, as you might guess: "I kiss so hot." From Giuditta by Frans Lehár; accompanist: Ingrid Surgenor.
Every day there are news reports of new health advice, but how can you know if they're right? Doctor and epidemiologist Ben Goldacre shows us, at high speed, the ways evidence can be distorted, from the blindingly obvious nutrition claims to the very subtle tricks of the pharmaceutical industry.
Some kids learn by listening; others learn by doing. Geoff Mulgan gives a short introduction to the Studio School, a new kind of school in the UK where small teams of kids learn by working on projects that are, as Mulgan puts it, "for real."
Modern medicine is in danger of losing a powerful, old-fashioned tool: human touch. Physician and writer Abraham Verghese describes our strange new world where patients are merely data points, and calls for a return to the traditional one-on-one physical exam.
Studies show that sketching and doodling improve our comprehension -- and our creative thinking. So why do we still feel embarrassed when we're caught doodling in a meeting? Sunni Brown says: Doodlers, unite! She makes the case for unlocking your brain via pad and pen.
What is killing the Tasmanian devil? A virulent cancer is infecting them by the thousands -- and unlike most cancers, it's contagious. Researcher Elizabeth Murchison tells us how she's fighting to save the Taz, and what she's learning about all cancers from this unusual strain. Contains disturbing images of facial cancer.
HIV is a serious problem in the DR Congo, and aid agencies have flooded the country with free and cheap condoms. But few people are using them. Why? "Reformed marketer" Amy Lockwood offers a surprising answer that upends a traditional model of philanthropy. (Some NSFW images.)
Have you played with Google Labs' Ngram Viewer? It's an addicting tool that lets you search for words and ideas in a database of 5 million books from across centuries. Erez Lieberman Aiden and Jean-Baptiste Michel show us how it works, and a few of the surprising things we can learn from 500 billion words.
Over the past few centuries, Western cultures have been very good at creating general prosperity for themselves. Historian Niall Ferguson asks: Why the West, and less so the rest? He suggests half a dozen big ideas from Western culture -- call them the 6 killer apps -- that promote wealth, stability and innovation. And in this new century, he says, these apps are all shareable.
TV executive Lauren Zalaznick thinks deeply about pop television. Sharing results of a bold study that tracks attitudes against TV ratings over five decades, she makes a case that television reflects who we truly are -- in ways we might not have expected.
Artist Kate Hartman uses wearable electronics to explore how we communicate, with ourselves and with the world. In this quirky and thought-provoking talk, she shows the "Talk to Yourself Hat", the "Inflatable Heart", the "Glacier Embracing Suit", and other unexpected devices.
Despite multibillion-dollar investments in cybersecurity, one of its root problems has been largely ignored: who are the people who write malicious code? Underworld investigator Misha Glenny profiles several convicted coders from around the world and reaches a startling conclusion.
Economist Yasheng Huang compares China to India, and asks how China's authoritarian rule contributed to its astonishing economic growth -- leading to a big question: Is democracy actually holding India back? Huang's answer may surprise you.
Artist Raghava KK demos his new children's book for iPad with a fun feature: when you shake it, the story -- and your perspective -- changes. In this charming short talk, he invites all of us to shake up our perspective a little bit.
Before life existed on Earth, there was just matter, inorganic dead "stuff." How improbable is it that life arose? And -- could it use a different type of chemistry? Using an elegant definition of life (anything that can evolve), chemist Lee Cronin is exploring this question by attempting to create a fully inorganic cell using a "Lego kit" of inorganic molecules -- no carbon -- that can assemble, replicate and compete.
Every new invention changes the world -- in ways both intentional and unexpected. Historian Edward Tenner tells stories that illustrate the under-appreciated gap between our ability to innovate and our ability to foresee the consequences.
Buddhist roshi Joan Halifax works with people at the last stage of life (in hospice and on death row). She shares what she's learned about compassion in the face of death and dying, and a deep insight into the nature of empathy.
MIT researcher Skylar Tibbits works on self-assembly -- the idea that instead of building something (a chair, a skyscraper), we can create materials that build themselves, much the way a strand of DNA zips itself together. It's a big concept at early stages; Tibbits shows us three in-the-lab projects that hint at what a self-assembling future might look like.
In 2003, the Palestinian village of Budrus mounted a 10-month-long nonviolent protest to stop a barrier being built across their olive groves. Did you hear about it? Didn't think so. Brazilian filmmaker Julia Bacha asks why we only pay attention to violence in the Israel-Palestine conflict -- and not to the nonviolent leaders who may one day bring peace.
Sharing the results of a massive, worldwide study, geneticist Svante Pääbo shows the DNA proof that early humans mated with Neanderthals after we moved out of Africa. (Yes, many of us have Neanderthal DNA.) He also shows how a tiny bone from a baby finger was enough to identify a whole new humanoid species.