PROJECTS REMAKING HISTORY

Levi ben Gershon and the Jacob’s Staff

image

David Ben-Hador, courtesy of the Israel Philatelic Service, Israel Postal Company

image TIME: AN HOUR image COMPLEXITY: EASY

Build the clever instrument that told sailors their latitude for 200 years.

By William Gurstelle Illustrated by Damien Scogin

In the days before GPS satellites and computers, how did sailors like Christopher Columbus navigate from one port to another? Well, there were several ...

Get Make: Technology on Your Time Volume 32 now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.