Pepper spray, Tasers, tear gas, rubber bullets -- these "non-lethal" weapons are being used by more and more local police forces, as well as military forces brought in to control civilian crowds and other situations. Despite their name, non-lethal weapons have been known to cause deaths ... and as Stephen Coleman suggests, there are other, more insidious hazards as well. He explores the complex ethics -- and the unexpected consequences -- of using non-lethal weapons to control civilians.
How do you remember where you parked your car? How do you know if you're moving in the right direction? Neuroscientist Neil Burgess studies the neural mechanisms that map the space around us, and how they link to memory and imagination.
From the "I have a dream" speech to Steve Jobs' iPhone launch, many great talks have a common structure that helps their message resonate with listeners. In this talk, presentation expert Nancy Duarte shares practical lessons on how to make a powerful call-to-action.
From deep in the TED archive, Danny Hillis outlines an intriguing theory of how and why technological change seems to be accelerating, by linking it to the very evolution of life itself. The presentation techniques he uses may look dated, but the ideas are as relevant as ever.
What if you're in surgery and the power goes out? No lights, no oxygen -- and your anesthesia stops flowing. It happens constantly in hospitals throughout the world, turning routine procedures into tragedies. Erica Frenkel demos one solution: the universal anesthesia machine.
We believe we should work hard in order to be happy, but could we be thinking about things backwards? In this fast-moving and very funny talk, psychologist Shawn Achor argues that, actually, happiness inspires us to be more productive.
Surgery, chemotherapy and radiation are the best-known methods for treating cancer. At TEDMED, Bill Doyle presents a new approach, called Tumor Treating Fields, which uses electric fields to interrupt cancer cell division. Still in its infancy -- and approved for only certain types of cancer -- the treatment comes with one big benefit: quality of life.
Peter van Uhm is the Netherlands' chief of defense, but that does not mean he is pro-war. In this talk, he explains how his career is one shaped by a love of peace, not a desire for bloodshed -- and why we need armies if we want peace.
We make millions of online purchases daily, but who (or what) actually puts our items into packages? In this talk, Mick Mountz weaves a fascinating, surprisingly robot-filled tale of what happens inside a warehouse.
Bjarke Ingels' architecture is luxurious, sustainable and community-driven. In this talk, he shows us his playful designs, from a factory chimney that blows smoke rings to a ski slope built atop a waste processing plant.
Women aren't micro--so why do they only get micro-loans? Reporter Gayle Tzemach Lemmon argues that women running all types of firms-- from home businesses to major factories-- are the overlooked key to economic development.
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."
Every doctor makes mistakes. But, says physician Brian Goldman, medicine's culture of denial (and shame) keeps doctors from ever talking about those mistakes, or using them to learn and improve. Telling stories from his own long practice, he calls on doctors to start talking about being wrong.
In the 1970s, Diana Nyad set long-distance swim records that are still unbroken. Thirty years later, at 60, she attempted her longest swim yet, from Cuba to Florida. In this funny, powerful talk at TEDMED, she talks about how to prepare mentally to achieve an extreme dream, and asks: What will YOU do with your wild, precious life?
2012 may be the year of 3D printing, when this three-decade-old technology finally becomes accessible and even commonplace. Lisa Harouni gives a useful introduction to this fascinating way of making things -- including intricate objects once impossible to create.
What makes you, you? Is it how you think of yourself, how others think of you, or something else entirely? Philosopher Julian Baggini draws from philosophy and neuroscience to give a surprising answer.
Scott Rickard set out to engineer the ugliest possible piece of music, devoid of repetition, using a mathematical concept known as the Costas Array. In this surprisingly entertaining talk, he shares the math behind musical beauty ... and its opposite.
We all want customized experiences and products -- but when faced with 700 options, consumers freeze up. With fascinating new research, Sheena Iyengar demonstrates how businesses (and others) can improve the experience of choosing.
What does a bill like PIPA/SOPA mean to our shareable world? At the TED offices, Clay Shirky delivers a proper manifesto -- a call to defend our freedom to create, discuss, link and share, rather than passively consume.
Cybercrime expert Mikko Hypponen talks us through three types of online attack on our privacy and data -- and only two are considered crimes. "Do we blindly trust any future government? Because any right we give away, we give away for good."
What aspects of religion should atheists (respectfully) adopt? Alain de Botton suggests a "religion for atheists" -- call it Atheism 2.0 -- that incorporates religious forms and traditions to satisfy our human need for connection, ritual and transcendence.
After a crisis, how can we tell if water is safe to drink? Current tests are slow and complex, and the delay can be deadly, as in the cholera outbreak after Haiti's earthquake in 2010. TED Fellow Sonaar Luthra previews his design for a simple tool that quickly tests water for safety -- the Water Canary.
There are millions of prodigiously gifted musicians of disability around the world, and Charles Hazlewood is determined to give them a platform. Watch the debut performance of the British Paraorchestra.
We have no ways to directly observe molecules and what they do -- but Drew Berry wants to change that. He demos his scientifically accurate (and entertaining!) animations that help researchers see unseeable processes within our own cells.
In politics, it seems counterintuitive to engage in dialogue with violent groups, with radicals and terrorists, and with the states that support them. But Jonas Gahr Støre, the foreign minister of Norway, makes a compelling case for open discussion, even when our values diverge.
In 2011 three young women swept the top prizes of the first Google Science Fair. Lauren Hodge, Shree Bose and Naomi Shah describe their extraordinary projects -- and their route to a passion for science.