Answer:
Penicillin and the atomic bomb both proved to be large parts of World War II. Penicillin helped soldiers that needed that certain medicine. A saying was developed in WWII regarding penicillin: "Thanks to penicillin, we get to come home!". The atomic bomb was also a large factor in the war. The atomic bomb was created by scientists in New Mexico, the development was known as the "Manhattan project", it was a race against the Germans to create the first atomic bomb. The bombing of Hiroshima and Nagasaki proved to be bitter-sweet -- it marked the end of the war, but thousands of innocent Japanese citizens died because of that cause. The atomic bomb really was a massive invention because of the risk of the Germans creating one before the US scientists, and it could have gone much worse had they succeeded.
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