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CrashCourse 16 Apr 2026 20 here now

How did Earth form?: Crash Course Geology #2

What can a moon rock tell us about Earth’s distant past? All kinds of stuff! Like where its water came from, how it got its moon, and what its birth might have looked like. In this episode of Crash Co

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I need more Sage and Dwayne in my life
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I already love this.
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Back in Uni I started my degree with astronomy/physics and swapped over to Evriro/earth sci because while I adore astronomy and physics still, there was just SO MUCH to learn about here that tells us what is or could be out there. Plus Earth is still our one and only example of a planet supporting life that we know of, so learning about our little rock in space is pretty special to me.
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Sage! Rocks!
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I'm so ready to see the ending and watch the credits
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I love her energy!! thank you for this great project!
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FINALLY!!!!! I am soo happy crashcourse geology finally started, can't wait for the next episodes! Love Sage, her aura is everything, such a beautiful soul!! Her energy is just what the people need to appreciate geology more! Thanks to the whole crashcourse crew for this one! Gonna be a gem!
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Such a great way to frame these scientific theories: with competing theories! At some point, I hope the formation of Earth and Moon is as solid a theory as Continental Drift, for example, so that theory building can continue to solidify around a solid core. But for now, it’s all about the world of evidence to consider. Thank you CC for making another series that rocks 🌋
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I do love a science video with impact.
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I’m loving her energy
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Another great episode, I'm already worried there won't be enough episodes for you to cover all that I want you to teach the world about Geology!
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@jumu7983 From YouTube ↗ 21 Apr 2026 13
I was fully hoping for that terrible twos joke and Sage did not disappoint.
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Sage is crazy dope. Hope she sticks around for more CrashCourse stuff
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Late Heavy Bombardment would be a great rock band name...
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Hadean era seems awesome and terrifying
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From the pebbles on the beach to the cobbles in the street
Every stone that you can see will teach you rocks rock!
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Sage has such an incredible energy! I love her enthusiasm for all things SCIENCE! I keep waiting for her to go "Seatbelts, everyone!" and then take us on a magical schoolbus ride :D
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Sage is incredible. Pure joy to witness
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Rocks may rock, but Sage is super!
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@LeebMilder From YouTube ↗ 21 Apr 2026 164
Sage is such a joy, I hope yall consider her for other future projects too :D