Podcasts
Shop
Our partners
Before you go any further...
I've read and accept the Terms of Use and the Privacy Policy.
I accept to receive newsletter and other communications associated with firms of The Explorers Network group'
I accept to receive commercial offers of The Explorers Network partners'.
Thanks!
Vote everyday for your favorite content
SENSITIVE CONTENT
This media contains sensitive content which some people may find disturbing or offensive.
You must be 15 years of age or older to view sensitive content.
Log inBirthday
Content being validated
THE EXPLORERS +
Watch our premium movies
The Explorers + is our premium movie catalog in Ultra High Definition (HD/4K/8K)! Hundreds of videos already available and daily new content on all your devices (web, mobile, tablets, smart TV).
Post content (photo or video) and get 1-month free
OR
Subscribe and support The Explorers Foundation's field actions for biodiversity.
Content being validated
Used from Roman times to the 17th century
0
0
The squirrel cage is a lifting device that served as a crane on construction sites from Roman times until the 17th century. It was used either from the bottom of the constructions or on a fairly high point on the site. Quick to build, the squirrel cage could be easily dismantled and transported. This system made it possible to hoist a load of at least 660 pounds (300 kilos) thanks to the movement of a single man.
Related content
Médias en cours d’exploration