When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes): Audiobook
Book 2 of the Cliff's Notes series
According to The Books Insider's catalog data, the When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) audiobook runs 2.4 hours unabridged, narrated by AI Voice Brian (about 1.6 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 2.4 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 5 days |
| 1 hour / day | 3 days |
| 2 hours / day | 2 days |
| 1 hour / day at 1.5× | 2 days |
You'll finish in – by –
Part of The Audiobook Finish-Time Calculator: the same instrument for any audiobook we measure.
What our data says
- At 2.4 hours, it is shorter than 83% of the 7,179 World audiobooks in our catalog.
More narrated by AI Voice Brian
AI Voice Brian narrates 38 unabridged audiobooks in our catalog, 117 hours in all.
About as long, on the World shelf
152 World audiobooks in our catalog run within 10% of this length. The most popular on the store:
Computed from 409,794 English-language unabridged audiobooks in The Books Insider catalog (store data read November 3, 2026). Lengths are the store's own running times. Methodology.
About this listen
When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) is book 2 of Clifford L Falen Jr's Cliff's Notes series: a 2.4-hour unabridged recording, read by AI Voice Brian, released July 14, 2025, on the World and Theatre & Radio shelves.
The listen at a glance
- Length
- 2.4 hrs
- Narrated by
- AI Voice Brian
- Released
- July 14, 2025
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- World, Theatre & Radio, World Religions
- Series
- Cliff's Notes #2
- ISBN
- 9798347392940
How to listen to When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) free
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Start listening freeQuestions listeners ask
How long is the When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) audiobook?
When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) runs 2.4 hours unabridged. At 1.5× speed that drops to roughly 1.6 hours.
Is the When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes)?
When the Sky Fell: Challenging Paradigms of Our Ancient Past and Cosmic Ancestry (Cliff's Notes) is narrated by AI Voice Brian.