This is a documentary from 1970 explaining the how the evidence was gathered and how the theory was developed. At that time it was only 2 years old! There’s a g

This is a documentary from 1970 explaining the how the evidence was gathered and how the theory was developed. At that time it was only 2 years old! There’s a good deal of excitement from the scientists, and a splendid collection of the practical models they used to demonstrate it.