On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden: Audiobook
According to The Books Insider's catalog data, the On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden audiobook runs 11.6 hours unabridged, narrated by Donna Postel (about 7.8 hours at 1.5× playback speed).
The instrument When will you finish it?
Based on 11.6 hours of listening.
| Your pace | You'll finish in |
|---|---|
| 30 min / day | 24 days |
| 1 hour / day | 12 days |
| 2 hours / day | 6 days |
| 1 hour / day at 1.5× | 8 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 11.6 hours, it runs longer than 87% of the 4,073 Animals & Nature (Non-Fiction) audiobooks in our catalog.
More narrated by Donna Postel
Donna Postel narrates 155 unabridged audiobooks in our catalog, 1,608 hours in all.
About as long, on the Animals & Nature (Non-Fiction) shelf
462 Animals & Nature (Non-Fiction) 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
On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden is an audiobook by Elizabeth Hennessy: a 11.6-hour unabridged recording, read by Donna Postel, released July 31, 2020, on the Animals & Nature (Non-Fiction) and Unique Non-Fiction shelves.
The listen at a glance
- Length
- 11.6 hrs
- Narrated by
- Donna Postel
- Released
- July 31, 2020
- Format
- Unabridged audiobook
- Language
- English
- Store shelves
- Animals & Nature (Non-Fiction), Unique Non-Fiction
- ISBN
- 9781705242582
How to listen to On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden free
New members at audiobooks.com get three free audiobooks with the trial.
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Start listening freeQuestions listeners ask
How long is the On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden audiobook?
On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden runs 11.6 hours unabridged. At 1.5× speed that drops to roughly 7.8 hours.
Is the On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden audiobook free?
Yes, for new listeners: the trial starts you with three free audiobooks.
Who narrates On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden?
On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden is narrated by Donna Postel.
Is On the Backs of Tortoises: Darwin, the Galapagos, and the Fate of an Evolutionary Eden worth listening to at 1.5× speed?
At 1.5× you'd finish in about 7.8 hours, saving 3.9 hours.