Draining The Oceans Is HARD

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From: minutephysics
Duration: 6:56
Views: 344,335

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It's hard to drain the oceans because it's a nonlocal phenomenon. Luckily there's a clever algorithm that's similar to the "paint bucket" tool in photoshop or other image editing software that allows us to figure out where remnant ocean basins will be.

Further reading:
- https://www.youtube.com/watch?v=Jpy55EgMQgY
- https://www.youtube.com/watch?v=FkUNHhVbQ1Q

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MinutePhysics provides an energetic and entertaining view of old and new problems in physics - all in a minute!

Created by Henry Reich
Produced by Joshua Chawner

00:00 - Intro
00:50 - The 2D Problem
02:09 - The 3D Problem
04:09 - Considerations
04:52 - The 3D Solution!
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06:42 - XKCD's What If

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jlvanderzwan
6 hours ago
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The Dutch, doing their best Bane impression: "For you."
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Wild Horses Went Extinct...So Why Are There Still Wild Horses?

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From: Bizarre Beasts
Duration: 12:18
Views: 71,676

Przewalski’s horse, also known as the takhi, roamed wild across Eurasia continuously for tens of thousands of years. And with their disappearance, Earth lost the last of its truly wild horses.
But the story of the takhi actually has a happy ending.

Endlings portrait illustrations are by Zoe Keller. You can find out more about her and her work here: https://www.zoekeller.com/

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#BizarreBeasts #horse #endlings
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Sources:
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/3F3BEA3AA6FD22E12AB9D32DAA12D90C/S0030605300005421a.pdf/new-sighting-of-przewalski-horses.pdf
https://www.cms.int/sites/default/files/document/cms_cop12_doc.25.1.8_listing-proposal-p-horse-appI-mongolia_e.pdf
https://www.mdpi.com/2076-2615/15/5/613
https://www.nature.com/articles/s41586-021-04018-9
https://www.biotaxa.org/mjbs/article/view/26825/24749
https://www.nature.com/articles/s41598-021-86832-9#Sec13
https://www.pnas.org/doi/10.1073/pnas.1523158113#sec-2
https://reviverestore.org/projects/przewalskis-horse/species/#:~:text=The%20Mongolians%20call%20the%20horse,left%20to%20its%20own%20devices
https://reviverestore.org/projects/przewalskis-horse/species/
https://pmc.ncbi.nlm.nih.gov/articles/PMC11898140/
https://phys.org/news/2024-06-genome-wild-horse-species.html#google_vignette

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Images:
https://docs.google.com/document/d/1ouNHJ3ex_RVaAUc_qDKd4ELDngbukAJuYZrD53Rqe6w/edit?usp=sharing

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jlvanderzwan
6 hours ago
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Przewalski horses are also notorious final bosses in spelling bees. In the infamous 2013 edition of the Dutch national spelling bee, which was written by comedian Kees van Kooten who decided to troll the entire country with the craziest collection of words he could find, featured "przewalskipaardenmiddel" - literally "przewalski horse tranquilizer", as one of its words
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Service Outage

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Now, if it were the *Canon* wiki, it's possible to imagine someone with a productivity-related reason for consulting it, but no one's job requires them to read that much about Admiral Daala.
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jlvanderzwan
18 hours ago
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Gee I wonder which side people using RSS feeds are on...
Wusty
11 hours ago
lol
ttencate
9 hours ago
Do you know what NewsBlur runs on, though?
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1 public comment
alt_text_bot
1 day ago
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Now, if it were the *Canon* wiki, it's possible to imagine someone with a productivity-related reason for consulting it, but no one's job requires them to read that much about Admiral Daala.

Why Don’t Jet Engines Melt?

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From: Veritasium
Duration: 39:34
Views: 2,938,485

How does a jet engine not melt? Sponsored by KiwiCo - Use code VERITASIUM to get 50% off your first monthly KiwiCo Crate! https://www.kiwico.com/VERITASIUM
Want to start your own crystal garden? https://www.kiwico.com/crystalchemistry

Our friends at Science Alert are doing a sweepstakes where you can win a 5-day space themed vacation for two. The itinerary includes a trip to the Kennedy Space Center in Florida for astronaut training and a meet and greet with a NASA astronaut. If you’d like to be entered in the draw, just subscribe to their free science newsletter Spark. No purchase necessary. Open to US residents only.
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We have a tabletop game launching! Check it out here! - https://ve42.co/kickstarterdje

▀▀▀
0:00 How a jet engine works
3:18 Why are jet engines so big?
5:17 The Inside of a Jet Engine
8:49 Edge Dislocation
11:11 The First Jet Engine
12:48 Inside the Rolls-Royce Precision Casting Facility
17:07 Nickel Superalloys - Gamma Prime
23:58 Crystal Structure
25:38 Making a Turbine Blade
32:22 Why don’t turbine blades melt?
35:30 Throwing Sand Into a Jet Engine

▀▀▀
A big thanks to Ben Todd, James Banks, Ben Fifoot, Doug Smith, Stefan Wagner, Rumaanah Hoosen and the rest of the team at Rolls-Royce.

A huge thanks also to Professor Howard Stone and Dr George Wise from the University of Cambridge.

We’re also incredibly grateful to Professor Jaafar A. El-Awady, Dr Karen A Thole, Professor Cathie Rae, Professor Paul Withey, Professor Pedro Patrício, Professor José Tavares and Ryan Moreman for their time and expertise.

Thanks to Institute for Materials, Ruhr University Bochum, SFB Transregio 103 for the animation showing the microstructure of the nickel superalloy. Full youtube video here - https://www.youtube.com/watch?v=wYHch5QIWTQ

Thanks to Professor Hongbiao Dong for the animation showing the grain selection in a single crystal turbine blade. Full youtube video here: https://www.youtube.com/watch?v=br9iaeYYxSM

References: https://ve42.co/JetEngineRefs

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Adam Foreman, Albert Wenger, Alex Porter, Alexander Tamas, Anton Ragin, Anupam Banerjee, armedtoe, Bertrand Serlet, Blake Byers, Bruce, Dave Kircher, David Johnston, David Tseng, Evgeny Skvortsov, Garrett Mueller, Gnare, gpoly, Hayden Christensen, Ibby Hadeed, Jeromy Johnson, Jon Jamison, Juan Benet, KeyWestr, Kyi, Lee Redden, Marinus Kuivenhoven, Matthias Wrobel, Meekay, meg noah, Michael Bush, Michael Krugman, Orlando Bassotto, Paul Peijzel, Richard Sundvall, Robert Oliveira, Sam Lutfi, Tj Steyn, Ubiquity Ventures & wolfee

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Writers - Emilia Gyles, Casper Mebius & Derek Muller
Producer & Director - Emilia Gyles
Presenters - Derek Muller & Henry Van Dyck
Editor - Trenton Oliver
Camera Operators - Jack Coathupe, Justin Wood, Emilia Gyles, Henry Van Dyck & Derek Muller
Animators - Mike Radjabov, Emma Wright & Fabio Albertelli
Additional Editors - James Stuart & Peter Nelson
Researcher - Aakash Singh Bagga
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Production Team - Josh Pitt, Matthew Cavanagh, Anna Milkovic & Katy Southwood
Executive Producers - Casper Mebius & Derek Muller

Additional video/photos supplied by Getty Images, Storyblocks
Music from Epidemic Sound

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jlvanderzwan
2 days ago
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Is the title a reference to that stupid 9/11 conspiracy about jet fuel?

Great video though! Love the bubble demo, and I'm curious if we have other single-crystal metal things other than turbine blades
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Beam Dump

2 Comments and 3 Shares
We're adding some industrial flypaper to minimize reflection or scattering of customers who might complain.
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jlvanderzwan
4 days ago
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I think I'd be more concerned with the accelerating-to-relativistic-speeds bit that undoubtedly preceded this.
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1 public comment
alt_text_bot
6 days ago
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We're adding some industrial flypaper to minimize reflection or scattering of customers who might complain.

The Most Important Satellite You’ve (Probably) Never Heard Of

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From: PBS Space Time
Duration: 15:05
Views: 166,932

Remove your personal information from the web at https://joindeleteme.com/SPACETIME

One of the most important reasons we go to space is to know our own planet better. Today I'm going to tell you about an orbiting facility that literally watches Earth's biosphere breath and grow and die with incredible resolution. I'll talk about its profound existential and economic importance, and about why it's in danger of being lost.

PBS Member Stations rely on viewers like you. To support your local station, go to:http://to.pbs.org/DonateSPACE

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Pale Blue Dot By Carl Sagan
https://youtu.be/wupToqz1e2g?feature=shared&t=3

Search the Entire Space Time Library Here: https://search.pbsspacetime.com/

Hosted by Matt O'Dowd
Written by Fernando Franco Félix & Matt O'Dowd
Post Production by Leonardo Scholzer, Yago Ballarini & Stephanie Faria
Directed by Andrew Kornhaber
Associate Producer: Bahar Gholipour
Executive Producer: Andrew Kornhaber
Executive in Charge for PBS: Maribel Lopez
Director of Programming for PBS: Gabrielle Ewing
Assistant Director of Programming for PBS: John Campbell

Spacetime is a production of Kornhaber Brown for PBS Digital Studios.
This program is produced by Kornhaber Brown, which is solely responsible for its content.
© 2025 PBS. All rights reserved.

End Credits Music by J.R.S. Schattenberg: https://www.youtube.com/user/MultiDroideka

Space Time Was Made Possible In Part By:

Big Bang
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Gamma Ray Burst
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jim bartosh
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jlvanderzwan
6 days ago
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Wow, this is the coolest thing ever! Why have I never heard about this satelite before?!
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