Move Ignaz Semmelweis from Europe to New York between 1855 and 1860 and find him a job where people will listen to him. This will drastically alter the progress and outcome of the Civil War. If you are a fan of the Union Army, bonus points if you can get him drafted into the Union Army. If you are a fan of the CSA, bonus points if you can get him to the Carolinas or New Orleans instead of New York.
Might be fun...
Yes, I am still working on the Space Elevator. Feverishly.
Might be fun...
Yes, I am still working on the Space Elevator. Feverishly.