• 43: Postcards From the Edge
    Aug 13 2025

    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!

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    30 mins
  • Audience Survey Results
    Jul 30 2025

    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!

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    11 mins
  • 42: The Question of Life
    Jul 16 2025

    Nearly 30 years ago, one paper claimed to find the oldest evidence for life on Earth. How does that evidence hold up in 2025? Are these fossils or duds? Don’t panic, we’ll answer these questions to life, the universe, and everything in due time. Along the way, we’ll meet the most abundant mineral in the human body, an important fertilizer, and finish a trilogy of intense debates over a small Greenland isle.

    Extra Credit: Read The Hitchhiker’s Guide to the Galaxy, eat cake with sprinkles, and make sure to floss afterwards.

    Donate to support the show- anything is appreciated!

    Click here for the audience survey!

    Click here to read Dylan's Nature paper!

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    31 mins
  • 40: The Time War
    Jun 18 2025

    How old is the oldest slice of Earth's seafloor? The answer is more contentious than you would think. Today, we visit one of the most debated locations in the show: a small island off the Greenland shore named Akilia. Everything about these rocks has been contested, and we'll meet three scientists who form cornerstones of the debates.

    Extra Credit: Watch something on an old CRT TV, or count tree rings in a stump.

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    30 mins
  • 39: The Shattered Planet
    Jun 4 2025

    Earth’s crust is shattered into dozens of moving plates, but many other worlds operate very differently. What are some alternatives to plate tectonics?

    Today, we’ll compare tectonics on Earth with tectonics on other planets, through the lens of 3.9 billion-year-old rocks from Greenland. On the way, we’ll visit the westernmost town in the USA, visit one of our cosmic neighbors, and learn about the Occam’s Razor of geology.

    Extra Credit: find today’s planet in the night sky, drop a pebble every day this week and see if anything changes, or read “The Long Rain” by Ray Bradbury.

    Donate to support the show- anything is appreciated!

    Click here for the audience survey!

    Click here to read Dylan's Nature paper!

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    38 mins
  • 38: Hidden Gems
    May 21 2025

    This season's final arc is set in Greenland. Let's start with the most common rocks in the region: what are they and what stories do they tell about the world 3.9 billion years ago?

    Along the way, we'll weave a tapestry of stone, boil some rocks, and learn a bit about Dylan's birthstone.

    Extra credit: try the Play-Doh experiment from this episode, or make some stone soup.

    Click here for the audience survey!

    Donate to support the show- anything is appreciated!

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    32 mins
  • Bedrock Returns! How to Support the Show
    May 20 2025

    We're back! After nearly a year, Dylan has updates about his life and the future of the show.

    Please take the audience survey in the link below to let Dylan know how you'd like to support the show! Also, please check out the donate button if you like what you've heard so far.

    Click here for the audience survey!

    Donate to support the show- anything is appreciated!

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    9 mins