81. Why Bother Searching for Aliens?

The late Robert Solow was a giant among economists. When he was 98 years old he told Steve about cracking German codes in World War II, why it’s so hard to reduce inequality, and how his field lost its way. SOURCES:Robert Solow, professor emeritus of economics at the Massachusett ...  Afficher plus

Michael Crow is the president of Arizona State University, which U.S. News & World Report has called the most innovative school in the country for 11 years running. He tells Steve about why higher education needs to change, and how A.S.U. is leading the way. Plus: Steve has an an ...  Afficher plus

If television shows and movies are any indication, we humans spend a lot of our time subconsciously preparing for UFOs carrying maleficent aliens to descend on Earth. But should we rush to create an intergalactic battle plan? In actuality, finding otherworldly life won’t be so ...

A US government report on UFOs has said there was no clear explanation for the unidentified aircraft, but did not rule out extra-terrestrial origin. Hundreds of millions of dollars have been invested into searching for signs of alien intelligence. Ed Butler speaks to Lisa Kaltene ...  Afficher plus

Astrophysicist and TED Fellow Sarah Rugheimer searches for aliens -- but not the cartoony green kind. She's looking for extraterrestrial microbes by studying how these single-celled organisms emit gases, which could reveal evidence of them throughout the cosmos. Wondering if w ...

Half a mile below the surface of the earth, in a cave too hot to explore without an ice-packed suit, NASA scientist and Nat Geo explorer Penny Boston clambers around glassy crystals that are taller than telephone poles and wider than dinner tables. But it's not The Crystal Cave's ...  Afficher plus