birch | Isaac Arthur

Planets vs Megastructures – SFIA 750,000 Subscriber Special Edition

To celebrate 750,000 subscribers we're taking a look at the benefits and disadvantages of settling and terraforming planets vs constructing megastructure space habitats Watch my exclusive video on Retrocausality: https://nebula.tv/videos/isaacarthur-retrocausality Get...

Birch Planets: Galaxy-Sized Worlds

Birch Planets are enormous hypothetical Megastructures which would have more living area than every planet in our galaxy combined, and are even larger than Dyson Spheres. Mega Earths: https://youtu.be/ioKidcpkZN0 To find out more about megastructures, see the...