1.   A. The plan adopted for the space station did not include artificial gravity for at least two reasons.

2.   But going without artificial gravity is not a good alternative, notes Paul DiZio, assistant director of the Ashton Graybiel Spatial Orientation Laboratory at Brandeis University.

3.   On a cross-space journey to Mars, which will take several years, the ships probably will require artificial gravity.

4.   Programs should concentrate on issues connected with long-term survival in space -- creating artificial gravity on board space stations, for example.

5.   Sure, you can see the International Space Station moving across the night sky, but there is no artificial gravity and it has only one working toilet.

6.   There are no sentient robots or artificial gravity environments.

7.   Why was a spin-stabilized design that would generate artificial gravity through centrifugal force not used in the design of the international space station?

8.   A Japanese firm, Shimizu Corp., already has drawn up blueprints for the first space hotel, complete with artificial gravity in the upper observation deck.