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  • Ideas Quotes   632
  • If we could travel into the past, it's mind-boggling what would be possible. For one thing, history would become an experimental science, which it certainly isn't today. The possible insights into our own past and nature and origins would be dazzling. For another, we would be facing the deep paradoxes of interfering with the scheme of causality that has led to our own time and ourselves. I have no idea whether it's possible, but it's certainly worth exploring.
  • 4 years ago



    Tags : Carl Sagan Quotes , Past Quotes , Ideas Quotes
  • When I get an idea I start at once building it up in my imagination. I change the construction, make improvements and operate the device in my mind. It is absolutely immaterial to me whether I run my turbine in my thought or test it in my shop. I even note if it is out of balance.
  • 4 years ago



    Tags : Nikola Tesla Quotes , Running Quotes , Ideas Quotes