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Inventions

These innovations made this beautiful world!..

5 Topics 1919+ Questions 3 Levels per Topic

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Mechanical, Electrical, Electronic and Communication Devices - Inventions and Discoveries

TV, Refrigerator, Phone, Remote Control - How it came?..

Surgical techniques, Diagnostic tools (X-ray, MRI) and so many inventions to take care of you

Explosives, Alloys and Metals, Nanotechnology, Polymer Science, Nuclear Power, Renewable energy and so on

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310 random questions — different every retry