The second part of Jason and the Argonauts’ journey to Colchis features a boxing match with King Amycus and the defeat of Amycus's army. But what happens when the Argonauts encounter Phineas the seer? Listen to an audio retelling of the...

Space and dogs—two great ways to get young listeners interested in a story! A two-part audiobook features a tale about a dog named Bonzo and his astronomical adventure through outer-space.

Planet hunters say they've identified the first planet orbiting a distant star with conditions right to sustain liquid water and, perhaps, life.

An interview with astronomer Greg Laughlin about planet HD80606b, an exoplanet with extreme fluctuations in its temperature in a matter of hours. Aired Jan. 30, 2009 [10:16 min]

Ian Tattersall, author of Masters of the Planet, talks about the origin of humans, and how Homo sapiens became a dominant species. Aired Apr. 6, 2012 [38:44 min]

Even after astronomers voted to remove Pluto from the list of planets in our solar system in 2006, the controversy over what should be called a planet continues. Listen to this episode to find out why this is still an issue.

Dwarf planet 2012 VP-113 takes approximately 4,000 years to orbit the sun once. [11 mins. 55 secs.]

We'll hear about new work in the field of discovering exosolar planets -- including research that used the Hubble Space Telescope to take optical images of a planet orbiting a star some 25 light years away. [12 mins. 29]

Arizona's Lowell Observatory, famous for spotting 'Planet X' aka Pluto, hunts for exoplanets today.

What steps should planetary explorers take to prevent contaminating other planets with life from Earth?

Scientists using the Hubble Space Telescope have been able to detect the chemical signature of methane in the atmosphere of a planet orbiting a star 63 light-years away.

Journalist and author Mark Hertsgaard discusses how to prepare for a warmer planet.

Climate change is changing the world on every continent, and is affecting yields of staple crops like wheat and corn. With a growing population and an increasing demand for food, the future looks unsettling. Aired Apr. 18, 2014 [21:40 min]

Climate change may transform how and where farmers grow the food to feed rising numbers of mouths. [34 mins. 24]

Researchers are studying our moon's effects on the Earth to guide their search for habitable worlds elsewhere.

What's it like to live -- and cook -- on Mars? To find out, researchers are simulating Mars missions in Russia and on the slopes of a Hawaiian volcano.

In this segment, guest host Joe Palca checks in on the Mars rovers, and gets a preview of the Mars Phoenix mission.

The author of 'How I Killed Pluto' talks about the celestial object's status change.

New research finds a small -- but present -- chance of a collision between Earth and one of its planetary neighbors in the next few billion years.

Astronomer Steven Vogt discusses a new discovery of a potentially habitable exoplanet.

The book club reviews Dava Sobel's 2005 homage to the solar system.

Find out about the journey and progress of the New Horizons Mission to Pluto.

Although the Kepler planet-hunting telescope is no longer operating, discoveries remain to be made in its data to search for distant planets. The audio recording addresses this quest for exoplanets. [24:50]

Astronomers weigh in on how to keep the planet safe from near-Earth objects.