# Silo World Explained

> Apple TV's Silo reveals how underground silos were built after a 2049 US government project.
- Title: Silo World Explained · ScreenRant | Shortify
- Summary: Apple TV's Silo reveals how underground silos were built after a 2049 US government project. Apple TV's Silo series explains that 50 silos were created by a…
- Keywords: silo, apple tv, hugh howey, silo season 3, silo universe, silo 18, silo 17, silo 50, nuclear war, dust book, shift book, wool book
- Source: ScreenRant — https://screenrant.com/silo-world-location-history-explained
- Author: Greg MacArthur
- Published: 2023-06-07T13:10:18+00:00
- Read time: 1 min
- Topics: silo, apple tv, hugh howey, silo season 3, silo universe, silo 18, silo 17, silo 50, nuclear war, dust book, shift book, wool book
## Where Are The Silos?
The silos are located in Fulton County, Georgia, just outside Atlanta, USA.
## What's Outside The Silo?
The surface world is deadly poisonous, with suits failing to protect against toxic air.
## How Big Is Each Silo?
Each silo is 5,760 feet tall, equivalent to four Empire State Buildings stacked.
## How Many Floors Are There?
The silo has 144 levels, each 40 feet tall, extending over a mile deep into Earth.
## Who Created The Silo?
A 2049 US government project created 50 silos after a nuclear war in 2052.
## Silo Seasons 3 Reveals Origin
Season 3 explores the origin story of the silos, connecting past and present timelines.
## Changes From Books
Apple TV added The Syndrome and Flamekeepers, not present in Hugh Howey's books.
## What Happens When Leaving?
Leaving the silo leads to death from toxic air, with few exceptions.
## Silo Season 3 Focus
Season 3 connects the silos' origin to current events through flashbacks.
## Nanobots And Nuclear War
Nanobots caused a nuclear war in 2052, with humanity nearly facing a nanotech apocalypse.
## Silo's Worldbuilding Changes
The show introduced The Syndrome and Flamekeepers, key for seasons 2 and beyond.
## Silo Season 4 Plans
Season 4 will move further from books while staying true to Silo's essence.
## Silo's Origin Story
The silos were built by a 2049 US government project after a nuclear war in 2052.
## Silo's World Status
The silo world remains mysterious, with key questions still unanswered.
## Key takeaway

Apple TV's Silo series explains that 50 silos were created by a 2049 US government project after a nuclear war.