Aims.
Space agencies in the United States,Russia,Japan,Canada,and Europe are working together. They are using the zero gravity of space to experiments in biology,physics,and astronomy. They are learning about living in space over a long time,and the effects of this on the human body. The astronauts are growing plants to make oxygen. They are studying the Earth's weather and geography. And they are looking at planets and stars to understand the origin of the universe.