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Riverworld.

Imagine a world stretched along a single, endless river inside a colossal space megastructure. Explore the fascinating concept of the Topopolis, a futuristic habitat billions of miles long, where humanity might thrive in a sprawling civilization bound by physics, engineering, and imagination.

Watch my exclusive video Big Alien Theory https://nebula.tv/videos/isaacarthur–… Nebula using my link for 40% off an annual subscription: https://go.nebula.tv/isaacarthur Get a Lifetime Membership to Nebula for only $300: https://go.nebula.tv/lifetime?ref=isa… Use the link gift.nebula.tv/isaacarthur to give a year of Nebula to a friend for just $30. Visit our Website: http://www.isaacarthur.net Join Nebula: https://go.nebula.tv/isaacarthur Support us on Patreon: / isaacarthur Support us on Subscribestar: https://www.subscribestar.com/isaac-a… Facebook Group: / 1,583,992,725,237,264 Reddit: / isaacarthur Twitter: / isaac_a_arthur on Twitter and RT our future content. SFIA Discord Server: / discord Credits: Topopolis: The Eternal River Episode 487a; February 23, 2025 Written, Produced & Narrated by: Isaac Arthur Graphics: Apogii.uk, Ken York YD Visual, Steve Bowers, Udo Scroeter Select imagery/video supplied by Getty Images Music Courtesy of Epidemic Sound http://epidemicsound.com/creator.

Continue reading “Topopolis: The Eternal River Space Habitat” | >

Growing organs in the Lab — Find out how scientists are making human organs in the lab from stem cells. While we can’t grow fully functional human organs yet, they can grow organoids from stem cells to study organ development and 3D bioprint tissues that can one day be used to repair organs.

🌏 https://www.clevalab.com.

👉 You may also like: The Basic Principles of a Cell, https://youtu.be/R5z0VYBnZPs.

📖 This video is also a blog post with images and a PDF Summary visit: https://www.clevalab.com/post/growingorgans.

Continue reading “Growing Organs” | >

This episode is all about brain organoids. Cerebral organoids or brain organoids were developed in 2013 by Madeline Lancaster and Jürgen Knoblich. Brain organoids are also called mini-brains and they are a powerful tool to grow brain-like structures in petri dishes. Brain organoids enable studies on the development of brains, brain diseases or brain infections. In this video, we will talk how we can make brain organoids and how we use brain organoids.

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🔬 Ready for awesome scientific discussion?! Join us on Discord: / discord.

0:00 — Introduction to Brain Organoids.

Continue reading “Scientists Grow Mini Brains in the Laboratory! | Brain organoids” | >

UT Dallas researchers have identified the cause of LiNiO₂ battery degradation and developed a structural reinforcement method that could enable its commercial use in longer-lasting lithium-ion batteries.

Lithium nickel oxide (LiNiO₂) is a promising material for next-generation lithium-ion batteries with longer lifespans. However, its commercialization has been hindered by degradation after repeated charging cycles.

Researchers at the University of Texas at Dallas have identified the cause of this breakdown and are testing a solution that could overcome a major obstacle to its widespread use. Their findings were recently published din the journal Advanced Energy Materials.

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Cyber Warfare, Explained.
Use code JOHNNYHARRIS at the link below to get an exclusive 60% off an annual Incogni plan: https://incogni.com/johnnyharris.

From influencing elections to disrupting nuclear facilities, the threat of cyber warfare is both ever-present and mostly ignored. Israel, America, and Russia are just a few of the countries in the ever growing cyber arms race.

My videos go live early on Nebula. Sign up now and get my next video before everyone else: https://www.nebula.com/johnnyharris.

Check out all my sources for this video here: https://docs.google.com/document/d/1gaOjUIm3ucnKpQawfkaP_YXn…p=sharing.

Continue reading “Why Hacking is the Future of War” | >

“Acquisitions and programs are moving forward,” an SDA spokesperson said in a statement to SpaceNews, adding that the agency is preparing to release a fresh solicitation for the 10 satellites in the near future.

Tranche 3 Tracking Layer proposals

In parallel with efforts to correct procurement missteps, SDA is advancing the first major satellite acquisition since Tournear’s removal: a 54-satellite procurement for the Tranche 3 Tracking Layer of the Proliferated Warfighter Space Architecture (PWSA). This next-generation missile tracking constellation builds on the foundation of earlier tranches, expanding coverage and improving real-time threat detection capabilities.

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