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NASA scientist Homer E. Newell Jr. explaining principles of altitude, pressure, and temperature, c. 1973
NASA scientist Homer E. Newell Jr. explaining principles of altitude, pressure, and temperature, c. 1973
A chalkboard with an eraser in the chalk tray
A chalkboard with an eraser in the chalk tray
Stick-slip effect with a chalk on a blackboard
Stick-slip effect with a chalk on a blackboard
Middle school chemistry on a blackboard in Beijing, China, 2011
Middle school chemistry on a blackboard in Beijing, China, 2011
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The Rosetta Stone, with writing using three different scripts, was instrumental in deciphering Egyptian hieroglyphs
The Rosetta Stone, with writing using three different scripts, was instrumental in deciphering Egyptian hieroglyphs
Olin Levi Warner, tympanum representing Writing, above exterior of main entrance doors, Thomas Jefferson Building, Washington DC, 1896
Olin Levi Warner, tympanum representing Writing, above exterior of main entrance doors, Thomas Jefferson Building, Washington DC, 1896
Documents that are connected by hyperlinks
Documents that are connected by hyperlinks
Globular envelope with a cluster of accountancy tokens, Uruk period, from Susa – Louvre Museum
Globular envelope with a cluster of accountancy tokens, Uruk period, from Susa – Louvre Museum