Electric tram was invented by?
Which dynasty had its capital at Chittorgarh?
Who discovered radioactivity?
The first large scale electrical air conditioning was invented and used in 1902 by
Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
Aaton Van Leewen Hock is famous for the discovery of ___.
Who invented the mouse of a computer?
Who invented the pendulum clock?
Stainless steel was invented by
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