Down he came,very slowly. Soon,both men were busy placing experiments to be left behind on the moon.

VOA: special.2009.07.15

Such experiments ended. Cuba and the United States both honored Clara Maass on postage stamps.

VOA: special.2009.01.27

Some of the experiments focus on studying how orbiting in space can affect the human body and plant growth.

VOA: standard.2010.04.05

The United States is the only country in the world that still allows federally-funded medical experiments on chimpanzees.

VOA: standard.2010.02.16