Studying the positions movements of single molecules in a fluid is near-impossible; increasingly (as we've eaten all of the low-hanging fruit), more science is

Studying the positions movements of single molecules in a fluid is near-impossible; increasingly (as we've eaten all of the low-hanging fruit), more science is being done through simulation. Certainly, we should vet those simulations very carefully (as should we more direct experiments). But they're just another tool to understanding the world.