What is the world's oldest slice of mantle, and how did it reach the surface?

Today, we'll meet the first tangible piece of the world below the crust, a world humans still have not visited. Along the way, we'll meet an old mineral friend from Season 1, a researcher named Friend, and learn how diamonds can be a geologist's best friend when looking for slices of the mantle.

Extra Credit: Clean your bathtub, or call an old friend.

Donate to support the show- anything is appreciated!

In 1971, two geologists traveled to the edge of Greenland's ice sheet. What they found were the oldest rocks known at the time, 3.8-3.7 billion years old.

Shockingly, they were in decent condition, sparking a half-century of geology stories. Today we'll begin our tour of Isua, the final destination of Season 2. Along the way, we'll meet a Holocaust survivor who landed on top of the world, visit an iron mine surrounded by glaciers, and start to meet the highest-quality rocks of this season.

Extra Credit: Eat some candy, some shrimp, or some Indian food.

Donate to support the show- anything is appreciated!

Two months ago, I made an audience survey focusing on one topic: how would you like to support the show?

Many folks answered, and here's what you said about donations, Patreon, ads, and merch.

If you want to give your own opinion, take the survey here, put a comment below, or send a message to bedrock.mailbox@gmail.com.

If you'd like to give a donation, you can click here- any amount is appreciated!