Searching for life beyond Earth with Sara Seager

Searching for life beyond Earth with Sara Seager

April 7, 2026 · 50 min

About this episode

Astrophysicist Sara Seager discusses her work and thoughts on the search for extraterrestrial life and robotic missions to Venus.

What if life isn’t just “out there”, but closer than we think? For the first time in more than 50 years, humans have left Earth's orbit, marking a significant point in history. And as NASA’s Artemis II mission makes its historic journey around the moon, we explore the thought-provoking question driving this return to space: are we alone? From pioneering techniques to study distant worlds to leading bold robot missions to Venus, Toronto-born Sara Seager is helping redefine how (and where) we look for life in the universe. Alongside podcast host David McGuffin, this episode featuring Seager is all about space: exoplanets, phosphine gas, future space missions and, of course, life beyond Earth. As a global leader in exoplanet science, Seager shares the story behind the controversial detection of phosphine gas in Venus’s clouds , a potential biosignature (a substance or phenomenon that provides evidence of past or present life) that sparked global debate, and why our neighbouring planet may hold surprising clues to alien life. A Canadian astronomer and professor at MIT, Seager is widely recognized for her work on exoplanets and planetary atmospheres. She is a recipient of a MacArthur…

More episodes of Explore: A Canadian Geographic podcast

Explore listener stats, chart rankings, contacts and more on the Explore: A Canadian Geographic podcast podcast page.