Jokes aside, ^I think that things would be substantially different. We are an evolving species that adapts to the environment. The first explorers would likely have never returned home due to wandering off into the distance and getting lost out at sea, future revolutions in technology would have been geared toward travelling those great distances with more speed and power we have today, natural resources would be more available probably even greater exotic material due to material densities being greater.
We would effectively be a more advanced intelligent species because our environment would have forced us to adapt at a faster rate