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Science and Technology
Science and Technology timelines
If John Hyatt hadn´t invented the plastic, what would have happened?
Cosmology
Space Exploration
HISTORIA DE LAS COMPUTADORAS
HISTORIA DE MICROSOFT
HISTORIA DE LOS BUSCADORES
HISTORIA DEL INTERNET
The Radioactivity
If Edward Jenner had not discovered the smallpox vaccine
History of the Germ Theory of Disease
Komodo No Hi Shop
radiometric dating
What would hapend if the global warming hadn't increased?
Technology in the 21st century
100 Greatest Discoveries: Blood Transfusion
without knowledge of plate tectonics
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