Fools! With a time machine, I would go forward, and read history books, I want to know how it all turned out and what I could maybe do today, or in the recent past, that may make our future become a reality sooner, or make it better....

I may also go back and hand a big pile of gold to Nikola Tesla so he can keep doing his thing..... That man did so much science that ushered in the technology we use today, that I can't see anything bad happening if he were allowed to live his life in comfort, continuing his research for another decade....

But I'm just a nerd.