This three-minute clip provides a quick overview of what we know about the planet Earth. It covers drilling, the layers of the Earth, and Earth's basic composition. The narration is very clear and easy to follow, unfortunately the clip...

This video provides a harrowing look from an astronaut's view of what is going on in our world. What we will we do to make our world a differnt place? This video shares what its like to see the Earth from orbit. [4:00]