Life is thought to need both water and the right chemicals to guarantee survival.

VOA: special.2010.05.25

Water and organic materials are necessary for life as we know it.

VOA: special.2010.05.25

Without water, life in the desert is not possible.

VOA: special.2009.08.12

It lives almost all its life in water.

VOA: special.2010.06.29