TED Talks Daily (SD video‪)‬ TED

Bill Ackman has made billions of dollars — and a name for himself — as an activist investor, buying up stock to push for change at companies. In this wide-ranging conversation with author and business ethics professor Alison Taylor, Ackman discusses how he's bringing his activism into the social and political spheres — and shares his thoughts on free speech, his notoriously long posts on X, the conversation around Harvard and DEI and more.

There's a reliable indicator of a woman's future likelihood of cardiovascular disease — but it rarely gets asked about, says obstetrician and researcher Meryam Sugulle. She delves into the role of the placenta in pregnancy, how it can predict health outcomes and the single question that should be worked into routine health screenings.

In an exploration of conflict and diplomacy, president and founder of Eurasia Group and GZERO Media Ian Bremmer joins TED's Helen Walters to unravel the ideological underpinnings, contrasting objectives and humanitarian crises defining the current situation in Gaza. Listen for the latest on Israel’s invasion of Rafah and what happened to the proposed ceasefire deal as well as a dissection of the elusive quest for peace in a region haunted by the specter of war.

Here's a conundrum: the same aerosol pollutants that harm human health also help cool the climate, says atmospheric scientist Sarah J. Doherty. Is there a way to clean up the air without warming the planet? Exploring the unintended consequences of reducing air pollution, she makes the case for a better understanding of marine cloud brightening — or intentionally adding sea salt aerosols to clouds over the ocean, which could reflect sunlight back into space and potentially reduce global warming.

In an exclusive preview of unreleased technology, designer and inventor Jason Rugolo unveils an entirely new kind of computer you can talk to like a friend. This "audio computer" — which can augment the sounds around you, translate conversations in real time, naturally respond to your voice and more — promises to shake up how we use our devices. It's shown publicly for the first time ever on the TED stage.

The electoral system in the United States needs a redesign, says political reformer Andrew Yang. Exposing the flaws of a system built on poor incentives, he proposes a cost-effective overhaul inspired by primary elections already working in places like Alaska and advocates for ranked-choice voting, where voters can choose candidates in order of preference regardless of party, stemming the influence of extreme ideologies.