The surprising way small actions shift beliefs | Kris De Meyer

Are you a giver or a taker? | Adam Grant

The boiling river of the Amazon | Andrés Ruzo

The next step in nanotechnology | George Tulevski

Meet the inventor of the electronic spreadsheet | Dan Bricklin

To solve old problems, study new species | Alejandro Sánchez Alvarado

Why some of us don't have one true calling | Emilie Wapnick

Why I love a country that once betrayed me | George Takei

The danger of a single story | Chimamanda Ngozi Adichie

TED Explores: Food for the Future | TED Countdown