October 2012
Intermediate to advanced
176 pages
6h 50m
English
PROJECTS REMAKING HISTORY

David Ben-Hador, courtesy of the Israel Philatelic Service, Israel Postal Company
TIME: AN HOUR
COMPLEXITY: EASY
Build the clever instrument that told sailors their latitude for 200 years.
In the days before GPS satellites and computers, how did sailors like Christopher Columbus navigate from one port to another? Well, there were several ...
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