It's the question of our generation: Can we find a sustainable alternative to oil? Scientists, inventors and activists present stern warnings and visionary solutions for the energy of tomorrow.

For the last 17 years, I've had the good fortune of participating in TED, both as a listener and a speaker. The talks often move me to tears. Listening to stories of passion, dedication and triumph remind me of how truly amazing humans can be. Below are some of my favorites.

Musician Ryuichi Sakamoto picks his favorite talks on ideas -- both musical and beyond. "Each talk expresses a vision no one else can have," he says. "They're a triumph of uniqueness and originality."

Amazing inventions, activism and tons of genius delivered by an awesome group of kids and teens.

We all know about the climate crisis. We all want to stay informed — but the information can be overwhelming. Watch these talks to hear what’s at stake and find out what's being done.

Talks from scientists, musicians, innovators, activists -- all under the age of 20. Watch these amazing wunderkinds.