Back on Earth, space scientists and engineers worked around the clock to design and test new ideas to help the astronauts survive.

VOA: special.2009.07.22

But the council says that is because the test can be taken almost every day of the year at more than 400 centers around the world.

VOA: special.2009.01.08

For the first time, scientists around the world had a limitless number of cells they could use to test the effects of diseases, medicines and chemicals.

VOA: special.2010.07.21

But it could launch Apollo spacecraft on test flights around the Earth.

VOA: special.2009.07.08

"They are around and they stand the test of time because they can still raise questions about what we are going through today."

VOA: standard.2010.04.08