PROJECTS REMAKING HISTORY
Levi ben Gershon and the Jacob’s Staff
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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