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I have made a new poll with both the theories and inventions you wished. Interesting to see if a theory is more worth than a practical invention.
It is also interesting that the three practical inventions are horse-related.
If you vote for
Other, it would be nice if you also posted a post and told us what that "Other" is.
Personally, I voted for
Germ Theory, because I think that would increase health, longevity and quality of life among the people.
So, feel free to vote and discuss!
