Not sure what you are getting at, field observations are an important part of many sciences like biology, geology, meteorology etc. Just as an example, if you w

Not sure what you are getting at, field observations are an important part of many sciences like biology, geology, meteorology etc. Just as an example, if you want to study animal behavior it is much more valid to study it in the natural habitat than in an artificially created environment. Sure, lab experiments area also used in these sciences, but they are really complementary to the field observations. In any case, your comment about evolving iguanas into cats and dogs indicate that you have a strange idea about about how evolution works. If a bad teacher gave you some wrong ideas then I can understand you skepticism. But you should probably try to understand evolution first before trying to criticize the theory as unscientific.