HeLa cells have gone to the moon to test the effect of zero gravity.

VOA: special.2010.07.21

By November,nineteen sixty-seven, the moon launch rocket,Saturn Five, was ready for a test flight.

VOA: special.2009.07.08

They wanted to test the landing module near the moon.

VOA: special.2009.07.08

We can use our time on the moon to develop and test new approaches and technologies and systems that will allow us to function in other, more challenging, environments.

CNN: Bush: 'It is time for America to take the next steps' in space

But Mr Aldrin disagreed with the view that astronauts should test capabilities for a long-duration flight on the Moon before attempting a journey to Mars.

BBC: Moon astronauts urge Mars mission

We may discover resources on the moon or Mars that will boggle the imagination, that will test our limits to dream.

CNN: Bush: 'It is time for America to take the next steps' in space