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apr 30, 1838 - Stereoscope image viewers were created.

Description:

By Joaquim Alves Gaspar (Own work (own photo)) [GFDL (http://www.gnu.org/copyleft/fdl.html), CC-BY-SA-3.0 (http://creativecommons.org/licenses/by-sa/3.0/) or CC BY 2.5 (http://creativecommons.org/licenses/by/2.5)], via Wikimedia Commons

Added to timeline:

5 months ago
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117
A Brief History of Educational Technology

Date:

apr 30, 1838
Now
~ 179 years ago

Images:

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