Extras

    Video thumbnail: Science Trek D4K: Geology Basics

    Science Trek

    D4K: Geology Basics

    How does geology impact your life?

    D4K: Geology Basics

    Video thumbnail: Science Trek D4K: Geology Video Short

    Science Trek

    D4K: Geology Video Short

    Rocks and minerals have a great story to tell.

    D4K: Geology Video Short

    Video thumbnail: Science Trek D4K: The Web Show: Geology

    Science Trek

    D4K: The Web Show: Geology

    What makes minerals soft or hard?

    D4K: The Web Show: Geology