Across history, protest has shaped societies in tremendous ways. These talks explore how movements catalyze monumental change.

We still have a lot to learn about climate change, about why it's happening and what that means. But one thing is clear: It's real, alright. These talks provide a primer on the issue of our times.

In the scope of Countdown, TED's initiative to accelerate solutions to climate change, the TED team collaborated with scientists and the creative studio Giant Ant to prepare five short animations explaining concepts and answering important questions related to the climate. They are narrated by Kristen Bell. Learn more about Countdown at countdow...

The little things that you (yes, you) can do now (yes, now) to make a difference.

Sure, we're looking beyond the planet to other worlds we may one day inhabit -- but a lot of this technology we've developed can be used for the good of the Earth, too.

Educator and activist Geoffrey Canada chose a powerful list of favorites — talks that address the cycles of poverty and gender violence, and offer bold suggestions for change.

The Audacious Project is TED's collaborative experiment to put bold ideas for social change into action. Learn more at AudaciousProject.org.

TED Studies, created in collaboration with Wiley, are curated video collections — supplemented by rich educational materials — for students, educators and self-guided learners. In Climate Change, speakers give talks that boldly illuminate the nature and scale of current-day climate science, policy and ethics. They explore the economics and psych...

The big and small ways invention and transformation can bring about new eras of inspired action, thought and change. (Curated in partnership with Project Management Institute.)

How will tech change our everyday life? Some fascinating ideas with far-reaching implications that could possibly change our world for the better.

Learn about the ways climate change is deeply altering how we live, where we live and the foods we eat -- ultimately threatening some of our most basic human rights.

We don't just need better laws -- we need better culture. Nate Garvis asks: What can we do to create an environment in which powerful institutions are used for the common good?

A great teacher can change the trajectory of your life. Here, talks from teachers you'll wish you had.

Written by the educators who created Climate Change, a brief look at the key facts, tough questions and big ideas in their field. Begin this TED Study with a fascinating read that gives context and clarity to the material. The greenhouse effect has been detected, and it is changing our climate now. James Hansen, June 24, 1988 The drought that cr...

Deepen your understanding of Climate Change with these carefully crafted educational exercises that let you get the most out of this TED Studies subject. Activity 1 Al Gore, James Balog, Lee Hotz, James Hansen and Naomi Klein are all working in various ways to increase the general public's knowledge of and engagement with climate change issues. ...

There are more ways to be civically engaged besides voting. Tap into your inner activist with these talks about inspiring change in your community.

The headlines on the front page always change. But these talks — on the seismic phenomenon underlying them — will give you fresh insight.

Tim Kruger researches geoengineering: techniques to counteract climate change by deliberate, large-scale intervention in the earth system -- either by reflecting sunlight back into space or by reducing the level of carbon dioxide in the atmosphere.

Robert Swan is the first person in history to walk to both the North and South Poles. Now he wants to make sure that Antarctica, the world's last great wilderness, is never exploited.

Lord Nicholas Stern studies the economics of climate change. He is a co-author of the position paper presented to the UN's 2014 Climate Summit, called "The New Climate Economy."

Allan Savory works to promote holistic management in the grasslands of the world.

Designer Emily Pilloton moved to rural Bertie County, in North Carolina, to engage in a bold experiment of design-led community transformation. She's teaching a design-build class called Studio H that engages high schoolers' minds and bodies while bringing smart design and new opportunities to the poorest county in the state.

Here's a stat worth knowing: In the UK, 63% of men who finish short-term prison sentences are back inside within a year for another crime. Helping them stay outside involves job training, classes, therapy. And it would pay off handsomely -- but the government can't find the funds. Toby Eccles shares an imaginative idea for how to change that: th...

After watching the collection of talks on Climate Change, read a thoughtful recap of the major points in this TED Study, and learn where experts believe things are headed. For the last quarter century, citizens have turned to climate scientists and policymakers as expert 'claims makers' to make sense of 'what is' and 'what to do about' climate c...

In far too many countries around the world, an education is not a given for girls. These moving talks are from those facing great risk to change that.

Antonio Donato Nobre researches the “ingenious systems” of the Amazon. His work illustrates the beautiful complexity of this region, as well as its fragility against a backdrop of climate change.

Toby Eccles has created a radical financial instrument that helps private investors contribute to solving thorny public problems.

Sociologist and philosopher Renata Salecl scrutinizes our individual and societal neuroses, and suggests ways out of our current paralysis.

Rob Dunbar looks deeply at ancient corals and sediments to study how the climate and the oceans have shifted over the past 50 to 12,000 years -- and how the Antarctic ecosystem is changing right now.