Cover art for podcast Overheard at National Geographic

Overheard at National Geographic

154 EpisodesProduced by National GeographicWebsite

Come dive into one of the curiously delightful conversations overheard at National Geographic’s headquarters, as we follow explorers, photographers, and scientists to the edges of our big, weird, beautiful world. Hosted by Peter Gwin and Amy Briggs.


Lucy in the Sky With Asteroids

How did the planets form? How did life happen? Where did Earth’s water come from? To answer questions like these, scientists used to go big—looking at planets, dwarf planets, and moons—but now small is the new big. Technology is zooming in on the pint-size stuff—asteroids, comets, meteors, and other chunks of space rock—that couldn’t be studied before, and Lucy, a spacecraft designed to visit eight asteroids near Jupiter, is poised to learn how the secrets inside these small bodies are reshaping ideas about the big old solar system.

For more information on this episode, visit

Want more?

How do you recover a sample from an asteroid? Send a spacecraft equipped with something akin to a Roomba at the end of a 10-foot pogo stick. Bennu's orbit brings it close to Earth. Now we have a precise calculation of the odds that—gulp—it will collide with us

Coming soon from NASA: a demonstration to test whether we could avert an oncoming asteroid.

Also explore:

In the early 1800s, astronomers wanted to find a missing planet. Instead, as our video series Nat Geo Explores shows us, they discovered the asteroid belt

For the first time, scientists are studying interstellar interlopers—asteroids and comets visiting us from another star system.

The solar system has always been a violent place. But Earth’s recent history suggests a rising tide of celestial impacts, according to one study.

And for paid subscribers:

Michael Greshko’s National Geographic cover story explains how the study of small objects is rewriting what astronomers know about the solar system.

If you like what you hear and want to support more content like this, please consider a National Geographic subscription. Go to to subscribe today.

Learn more about your ad choices. Visit

Educational emoji reaction


Interesting emoji reaction


Funny emoji reaction


Agree emoji reaction


Love emoji reaction


Wow emoji reaction


Are you the creator of this podcast?

Verify your account

and pick the featured episodes for your show.

Listen to Overheard at National Geographic


A free podcast app for iPhone and Android

  • User-created playlists and collections
  • Download episodes while on WiFi to listen without using mobile data
  • Stream podcast episodes without waiting for a download
  • Queue episodes to create a personal continuous playlist
RadioPublic on iOS and Android
Or by RSS
RSS feed

Connect with listeners

Podcasters use the RadioPublic listener relationship platform to build lasting connections with fans

Yes, let's begin connecting
Browser window

Find new listeners

  • A dedicated website for your podcast
  • Web embed players designed to convert visitors to listeners in the RadioPublic apps for iPhone and Android
Clicking mouse cursor

Understand your audience

  • Capture listener activity with affinity scores
  • Measure your promotional campaigns and integrate with Google and Facebook analytics
Graph of increasing value

Engage your fanbase

  • Deliver timely Calls To Action, including email acquistion for your mailing list
  • Share exactly the right moment in an episode via text, email, and social media
Icon of cellphone with money

Make money

  • Tip and transfer funds directly to podcastsers
  • Earn money for qualified plays in the RadioPublic apps with Paid Listens