You might have a 5-year plan, but what about a 200-year plan? Artist Raghava KK has set his eyes on an ultra-long-term horizon; at TEDxSummit, he shows how it helps guide today's choices and tomorrow's goals -- and encourages you to make...

Vincent Cochetel was held hostage for 317 days in 1998, while working for the UN High Commissioner on Refugees in Chechnya. For the first time, he recounts the experience — from what it was like to live in a dark, underground chamber,...

There's no actual law against women driving in Saudi Arabia. But it's forbidden. Two years ago, Manal al-Sharif decided to encourage women to drive by doing so -- and filming herself for YouTube. Hear her story of what happened next.

Giles Duley gave up a life of glamour and celebrity as a fashion photographer to travel the world and document the stories of the forgotten and marginalized. While on assignment in Afghanistan he stepped on a landmine, a horrific event...

Filmmaker Newton Aduaka shows clips from his powerful, lyrical feature film "Ezra," about a child soldier in Sierra Leone.

After losing her mother in a house fire when she was just six years old, Danielle Torley saw two paths before her: a life full of fear, or one that promised healing and recovery. In this inspiring talk, she describes how she turned her...

In a few million years, we’re going to have to leave Earth if we want to survive. But how long can we actually outrun extinction before the universe becomes uninhabitable to us?

Enceladus’ environment could totally be habitable for at least one real-world microbe and we just found the oldest supernova.

What is the world's favorite fossil? Why the orthoceras of course! Hank will tell why that is in this episode of SciShow. Find out how you can get your very own orthoceras fossil.

If you’re someone who is constantly coughing up mucus, you might not actually have allergies. There’s a possibility that your organs are flipped and you don’t even know it!

How many of today's headlines will matter in 100 years? 1000? Kirk Citron's "Long News" project collects stories that not only matter today, but will resonate for decades -- even centuries -- to come. At TED2010, he highlights recent...

Within this generation, an extra 30 years have been added to our life expectancy -- and these years aren't just a footnote. Jane Fonda asks how we can re-imagine this new phase of our lives.

The sun may have thousands of stellar siblings, many of them probably just like it, elsewhere in the galaxy. Find out how astronomers are looking for them, and learn about a match that could be our star's long-lost sibling!

2020 is going to be an exciting year for space exploration, if everything goes according to plan. Humans are heading to space in new spacecraft, multiple Mars missions are on the horizon, and scientists are getting a new perspective on...

It's possible that the moon might have been able to support life billions of years ago, and scientists are using meteorites to learn about the history of our sun.

New Horizons is on its way to Ultima Thule, the most distant object a spacecraft has ever visited. And scientists have created the sugar component of DNA under extraterrestrial conditions.