There may be more that is knowable now than back then, but I doubt you or I actually know more than an educated person back then. We just know different stuff.
https://graphics8.nytimes.com/packages/pdf/education/harvard...
That is not true. I guess you mean in the sense that our horizons have broadened because we have access to so much more information than people used to have, but in terms of things that can be known, nothing has changed. The facts of the universe are the same as they ever were.