What scientific breakthrough was made in the 1940s and 1950s?

a. paleontology

b. dna research

c. natural selection

d. cell theory

1st hour Science discoveries Many science discoveries were made and there have been many scientific achievements in the 1940's. Some achievement's are when Charles E. Jaeger broke through the sound barrier. Unfortunately he did not make it and passed away. Another is when the transitor a mini-hand held radio was created Some discoveries are when Barbara Mclintock discover transposition. Later on in the 1980's she received a Nobel peace prize for her discoveries.. Lastly the "Big Bang" theory was formulated and changed the way people looked at how the earth became. These discoveries have changed our lives forever and help us with our difficulties we have today. Medical Breakthroughs 

Closing a ring restricts the rotation around individual car bon carbon bonds hope it will you !