Could visual illusions be a cure for polarization? (Credits: Director of Photography: William Atherton; Production Design: Adam Pruitt; Creative Partner: SpecialGuest; Production company: 1stAveMachine; Producers: Dave Kornfield, Andrew Geller, Matt Snetzko; Music: Bryn Bliska; Executive Producer, TED2018 Film Program: Sinéad McDevitt; Director ...

A mother honeyguide has placed its chick into a bee-eater's nest— puncturing all the other eggs in the nest and leaving only its own hatching alive. Over the following weeks, the host parents devotedly care for the hatchling whose mother murdered their offspring. This is brood parasitism, a phenomenon which is especially well-known among birds. ...

Gráinne, princess of Tara and bride-to-be, was furious. She had thought she was betrothed to a young soldier, bold and brilliant enough to be her equal. Yet it soon became clear she was expected to marry Fionn, a warrior far past his prime. Not willing to suffer this insult, Gráinne decided that before the wedding she would exact her revenge. Is...

A unique ecosystem of plants, birds and monkeys thrives in the treetops of the rainforest. Nalini Nadkarni explores these canopy worlds -- and shares her findings with the world below, through dance, art and bold partnerships.

Cynthia Breazeal wonders: Why can we use robots on Mars, but not in our living rooms? The key, she says, is in training robots to interact with people. Now she dreams up and builds robots that teach, learn -- and play. Watch for amazing demo footage of a new interactive game for kids.

"Do what you love" is often terrible advice. Instead of taking the job that will make you happiest, look for the one where you'll learn the most. (Audio only)