Provides information about black holes, explaining how stars become black holes, looking at the types of black holes, and discussing what is inside a black hole and how scientists study them.

The dark side -- Why are black holes so mysterious? -- What is a black hole? -- How does a star become a black hole -- Types of black holes -- What kinds of black holes exist in space? -- Inside a black hole -- What is at the center of a black hole? -- Black hole jets -- What is a quasar? -- Understanding black holes -- How do scientists study black holes?.