Pack just enough to fit. Crews determine what personal items to take with them on a trip to Mars. Each team must decide what to take with them on a two-and-a-half year trip to Mars and whether their items will fit within the allotted...

This article explains what Earth Day is and why it was founded. It also presents criticisms of the holiday. Includes suggestions for things we can all do to take care of the Earth.

This article is an in-depth description of the first Earth Day, and includes the impact the demonstration had on the environmental movement.