Happy 2021! Let's celebrate with the first ever listener request. We're all about walls -- both Great and cosmic -- this week.
Thanks to Brooke V. for the request! Interested in hearing about a topic? Send an email to sixpackoffacts@gmail.com.
Research Links
Great Wall of China
History — Great Wall of China
Mentalfloss — 15 Colossal Facts About the Great Wall of China
Smithsonian Magazine — Sticky Rice Mortar, the View From Space, and More Fun Facts About China’s Great Wall
Galactic Walls
Swinburne Astronomy Online — Galactic Filaments
Goddard Space Flight Center — Sheets and Voids
Space.com — Here’s How Colossal Galaxy Clusters Reveal Dark Matter Secrets
ESA — What is the Universe Made Of?
