Water is essential to life. Every living creature depends on it for survival. Water is always moving above, on, and below the surface of the Earth. This natural movement is called the water cycle or the hydrologic cycle. During this cycle, water not only moves, but it also changes its state, or form.

This week we’re learning all about life in space, and today we’re talking about one of NASA’s projects aboard the International Space Station: the High Definition Earth Viewing system. Learn about the goals of this experiment, watch it’s live stream, and then try your hand at identifying locations on Earth by how the seen from an astronaut’s point of view!