She says the amount of space needed between the plants depends on how big you expect the heads to be.

VOA: special.2009.03.03

One of the most important was how to design the special clothing needed to protect a person from the dangers of the space environment.

VOA: special.2011.04.06

And it would answer a very important question: How would humans react to space flight?

VOA: special.2010.07.07

We asked Phil Sumrall how NASA expects to use Ares in its space exploration plans.

VOA: special.2009.12.30

And we will tell how spending months in space could be bad for your health.

VOA: special.2009.03.10

Here's a question you can debate online: How important is space exploration?

VOA: special.2010.04.28

Giotto explored how to represent three dimensional space using light and shade.

VOA: special.2010.06.23

Experts differ about how to space the plantings in the ground.

VOA: special.2010.03.09

NASA hopes that Dawn's year long orbit around Vesta will help scientists learn more about the development of the solar system, and how asteroids and other space objects were created.

VOA: special.2011.07.27

A high burden of infectious diseases. Lack of provision of family planning allowing a women to decide when to start and end having children and how to space her children.

VOA: special.2009.10.19

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

VOA: standard.2010.04.05