Scientists think the world's oldest ice is hiding somewhere in Antarctica. NPR science correspondent Nell Greenfieldboyce tells us how researchers plan to find it — and why. For more, you can also read Nell's story, "Scientists Have Found Some Truly Ancient Ice, But Now They Want Ice That's Even Older)."Email the show at [email protected]).Learn more about sponsor message choices: podcastchoices.com/adchoices)NPR Privacy Policy)