The first large scale electrical air conditioning was invented and used in 1902 by
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Who invented the Band-aid?
Stainless steel was invented by
Which dynasty had its capital at Chittorgarh?
Robert Hooke discovered cells by observing them in a ______.
Which of the following was the first antibiotic discovered by Alexander Fleming in 1928?
Where was paper invented?
Who discovered radioactivity?
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