If Nicolas Copernicus hadn’t discovered elliptical orbits; mankind would have thought that earth was the center of the galaxy.
If Hans Lippershey hadn’t invented the telescope; we wouldn’t have been able to develop astronomy sciences
If William Harvey hadn’t postulated his theory about blood’s circulation; mankind wouldn’t have known open heart surgery
If John Dalton hadn’t discovered the molecular weight; we could have not studied molecular composition
If Gregory Mendel hadn’t invented genetics; cloning would have not been possible.
If Karl Landsteiner hadn’t discovered the different types of blood; blood’s transfusions wouldn’t have been possible.
If William Harvey hadn’t postulated his theory about blood’s circulation; Karl Landsteiner wouldn’t have been able to discover the different types of blood.
If Alfred Wegner hadn’t discovered Pangaea; mankind would have thought that continents have been there forever.
If Alfred Wegner hadn’t discovered Pangaea; people wouldn’t have known that all continents have similar species.
Blood’s transfusions wouldn’t have been possible if Karl Landsteiner hadn’t discovered Rh blood group system
