to see the result before big investment.
Scientist use models to study things because models are sometimes easier to use than trying to study things in a natural environment.
Scientist use models
Scientist use models
Scientist use models
Some scientist have still now is search for resourse and some are left .............
Scientist use models
Scientist use models
Scientist use models
Scientist use models
Scientist use models
Scientist use models
Scientist use models