Over the course of ages, we have made countless discoveries that have improved the quality of our life and helped us to understand the world around us. It is very difficult (if not impossible) to rank the importance of the discoveries we have made, but one thing is for sure – some of them have literally changed our life. From penicillin and the screw pump to X-rays and electricity, here are 25 Biggest Scientific Discoveries in History of Mankind.
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