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zakruti.com » Knowledge, science, education » Crash Course
The Dark Ages of the Cosmos - Crash Course Pods: The Universe #3

The Dark Ages of the Cosmos - Crash Course Pods: The Universe #3

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Rating: 4.0; Vote: 1
Head to to get your free life insurance quotes and see how much you could save. In this episode, the universe as we know it starts to come into focus. Dr. Katie Mack teaches John Green about the cosmic dark ages, the possibility of a multiverse, and the connection between the hot, dense early universe and today. 0: 00 - Introduction 2: 09 - CMB & The Cosmic Web 9: 39 - The Possibility of a Multiverse 14: 20 - The Inflaton Field 20: 20 - Viewing Early Galaxies 24: 22- The Surface of Last Scattering 30: 35 - The Dark Ages of the Cosmos 34: 25 - Dark Matter & Cosmic Dawn 47: 01 - Feeling Awe Crash Course is on Patreon! You can support us directly by signing up at Thanks to the following patrons for their generous monthly contributions that help keep Crash Course free for everyone forever: Leah H, David Fanska, Andrew Woods, DL Singfield, Ken Davidian, Stephen Akuffo, Toni Miles, Steve Segreto, Kyle & Katherine Callahan, Laurel Stevens, Burt Humburg, Perry Joyce, Scott Harrison, Mark & Susan Billian, Alan Bridgeman, Breanna Bosso, Matt Curls, Jennifer Killen, Jon Allen, Sarah & Nathan Catchings, team dorsey, Bernardo Garza, Trevin Beattie, Eric Koslow, Indija-ka Siriwardena, Jason Rostoker, Siobhán, Ken Penttinen, Nathan Taylor, Barrett & Laura Nuzum, Les Aker, William McGraw, Vaso, ClareG, Rizwan Kassim, Constance Urist, Alex Hackman, Pineapples of Solidarity, Katie Dean, Stephen McCandless, Wai Jack Sin, Ian Dundore, Caleb Weeks __ Want to find Crash Course elsewhere on the internet Instagram - Facebook - Twitter - CC Kids:
Date: 2024-05-23

Comments and reviews: 18


It's awe-inspiring to think about the vastness and complexity of the universe, from the hot, dense early stages to the formation of stars and galaxies millions of years later. The interconnectedness and coherence of the cosmic timeline can evoke a sense of wonder and smallness in the face of such immense forces. The ability to understand and visualize these processes, from the first moments to the present day, is both thrilling and overwhelming, prompting questions about free will and determinism. The exploration of the universe's evolution can lead to a deep sense of awe and contemplation.
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Have a question.
We can see the cosmic background, and we can see the universe expanding.
Now image if the expansion stopped, and lets assume that the universe immediately started shrinking, and it shrinks in a speed lower than the speed of light. Would we be able to notice the change when looking far Not only detect that the expansion had stopped, but also would the data reveal that it was reverting back

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Eating left over corn salsa while listening to this and having my mind expanded by cosmic inflation. The universe is good.
multiverse me: agreed
multiverse me: here here
multiverse me: pass the chips
Me: woah
Everyone in the dovetail effect experiencing reality at the same time as me: WWWWWWHHHHHHAAAATTTT

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John really proves that the line they should have sent a poet from _Contact_ is absolutely true. I love space stuff on its face, but his enthusiasm and perspective is just astonishingly lovely. I feel more connected to reality as I understand it from the way he's framed so much of these episodes.
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Reading Neil Degrasse Tyson's books helps a lot with these concepts for those looking for a better understanding, like Origins: Revised & Updated, Fourteen Billion Years of Cosmic Evolution, Astrophysics for People in a Hurry, and Welcome to the Universe not to mention Katie's book of course.
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When Dr. Mack talks about fully modern galaxies within the first two to four hundred million years, what does that mean Do they have supermassive black holes at their core Do they contain roughly the modern proportions of heavy elements Thanks!
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I don't know John enough, I don't even know if he plays video games, but I can't help but think he would love Outer Wilds. This image of two people in camping chairs watching the stars makes it hard not to think about that wonderful game.
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I knew dark matter didn't interact with light, and I knew touch was based on electromagnetism, but I never connected the dots that those two were due to the same reason! In this sense, they are so similar to neutrinos.
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I have theorized that the National Hockey League is currently expanding at a faster rate than the universe and so will eventually consume all matter and occupy every empty space in existence except Quebec City
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Was there enough lithium made in the Big Bang to make some dust, and that would have helped cool those first gas clouds forming the first generation or stars
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So enjoying these podcasts, Katie really is able to explain things in a way that makes sense. I’ve just borrowed her book from the library.
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I love how this is a conversation between a writer and a scientist. Helps me understand instead of getting lost in the lingo. Wonderful series
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This podcast is honestly something that should be shared in classrooms. Its the best explanation of how the universe formed I've ever heard
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I love John casually rating the names of these universe epochs by how poetic they sound. Perfect combination of science and artistry
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So, can dark matter interact with other dark matter Could there be dark matter 'planets' Obviously I do not understand much here.
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I love this entire podcast, and I love every part of Dr. Mack's explanation's, but I also love dumb stuff like the Advertisement read.
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the cooling that allows compression by gravity is why fridges and aircons have to radiate heat whilst they cool and compress their gas
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The Surface of Last Scattering would be a great darkambient CD album title (edit: but so does The Dark Ages of the Cosmos )
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