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1. Why will we send spaceships to Mars? Because we will look for some important minerals there.

2. It will be expensive.

3. Astronauts will not travel on the spaceships. It will be too dangerous for people.

4. Why will we use robots? They will not need air, light, food or water.

5. They will need electricity.

6. Where will they get it from? They will get it from the Sun.

7. What will the robots do on Mars? The robots will look for minerals and send them back to Earth.

8. They won't come back to Earth. They will stay.