The Future Of Birds In North America, 190th Birthday For Tortoise. December 9, 2022, Part 1
Science Friday
Science Friday and WNYC Studios
4.4 • 6.3K Ratings
🗓️ 9 December 2022
⏱️ 48 minutes
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| 0:00.0 | This is Science Friday. I'm Ira Flato. This hour will be for the birds. Yes, as we look forward to the Christmas bird count and take your calls and tweets, give us a call. 844-724-8255, 844 SciTalk, or you can find us on Twitter at SciFri. Tell us what birds you're seeing at your favorite backyard sites or your local parks. |
| 0:22.1 | But first, some news from the world's biggest island. Scientists in Greenland have made a big discovery |
| 0:28.4 | the oldest DNA fragments ever found, and they were trapped in permafrost. These fragments |
| 0:34.6 | contain samples from various plants and animal life, some long extinct. |
| 0:39.3 | And it's from a time when Greenland was pretty bomby, a big departure from the icy country we know today. |
| 0:45.3 | This DNA is a big deal, a full one million years older than the previous record. |
| 0:51.3 | So why are scientists so excited about this find? |
| 0:54.8 | Joining me to talk about this and other science news of the week is someone who knows. |
| 0:59.2 | Umair Irfan, science writer at Vox, based in Washington. |
| 1:03.5 | Welcome to Science Friday. |
| 1:04.6 | Welcome back. |
| 1:05.9 | Thanks for having me back, Ira. |
| 1:07.5 | Nice to have you. |
| 1:08.3 | Okay, Umar, just how old are we talking about for this oldest DNA? |
| 1:12.6 | Well, we're talking two million years old, and as you noted, this is almost twice as old as |
| 1:17.6 | our previous record for genetic fossils that we found. |
| 1:21.6 | And this was exciting, as you noted, for a couple reasons. |
| 1:23.6 | One, it's sort of a validation of this technique. |
| 1:26.6 | Rather than, you know, |
| 1:27.9 | looking at a specific fossil or some piece of resin or something like that, what they did was |
| 1:32.9 | they actually collected a general sample from the sediment in the permafrost. And so this is sort |
| 1:37.9 | of a broad spectrum genetic time capsule that they were able to use. And from there, they were |
... |
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