experiment for living space

Scientists have been experimenting with the idea Living In Space for a long time . But it is not easy to live in Space. There is no gravity and the body needs a lot of adjusting to do. One of the scientists reported that his heart beat had become slower, and bones and muscles had felt weaker as calcium had been decreasing from them . His head had felt heavy as there was no gravity to keep blood down in the legs and there was also a feeling of Space sickness which is like travel sickness . Doing everyday jobs also becomes difficult . Water cannot be poured because it stays ion one place like a big ball. .If you want a drink , you must do it with straw from a closed container . If you sprinkle salt , it spreads all around you and heavy objects can be moved with one finger as they have no weight . Astronauts , therefore , need months of training to be able to adjust to conditions in Space.
The first Space Station Salyut was launched by the Russians in 1971 .Since then four Space Stations have been launched by the Russians and one American to conduct experiments in Space . Scientists have launched Space Stations which provide laboratories for living and conducting experiments . It is a 17-nation project which marks unprecedented international co-operation in Space research. The Space Station is expected to be completed by the year2006 .