Add punctuation: Mendeliev after years of research and labour suddenly saw the Periodic Table which opened the door to all modern chemistry in a dream Einstein generally considered to have been a lazy and rather mediocre pupil had the audacity to question some important paradigms in physics that were current at that time and changed the face of the world forever with his Theory of Relativity
Mendeliev, after years of research and labour, suddenly saw the Periodic Table - which opened the door to all modern chemistry - in a dream. Einstein, generally considered to have been a lazy and rather mediocre pupil, had the audacity to question some important paradigms in physics that were current at that time, and changed the face of the world forever with his Theory of Relativity.