Someday people from Earth may live on Mars. In this century, we will go to the planet to learn more about it. It will become our outpost in space -- our space colony.
【適讀程度】
Age Range: 4 - 8 years
Someday people from Earth may live on Mars. In this century, we will go to the planet to learn more about it. It will become our outpost in space -- our space colony.
【適讀程度】
Age Range: 4 - 8 years