Science: What are the Northern Lights?

This NASA educational video discusses the Aurora Borealis/Northern Lights.

Subject:  Astronomy
Grade Level:  5-12
Length:  4:39

Science: How does food nutrients get into the blood steam?

Here is a pretty cool animation that demonstrates the beginning of the digestive system and how the nutrients from your food actually get into the bloodstream.

Subject: Biology
Grade Level: 4-12
Length: 3:03