Space Station Science Lab
Kate Rubins talks about how the very limited amount of gravity means that it is the optimal place to conduct experiments. This means that we are able to able to investigate some phenomenon or property of an item, in a way that we are unable to reproduce on Earth.
The space station science lab allows that astronauts/scientists to test the effects of gravity and also to sometimes remove the factor of gravity itself. There are many other factors that cannot affect your experiments in space, such as wind, temperature etc.